]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - drivers/media/v4l2-core/v4l2-ctrls.c
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[media] documentation: DocBook/media : Fix typo in dvbproperty.xml
[mirror_ubuntu-artful-kernel.git] / drivers / media / v4l2-core / v4l2-ctrls.c
CommitLineData
0996517c
HV		 1/*
2 V4L2 controls framework implementation.
3
4 Copyright (C) 2010 Hans Verkuil <hverkuil@xs4all.nl>
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21#include <linux/ctype.h>
2b80163c 22#include <linux/slab.h>
35a24636 23#include <linux/export.h>
0996517c
HV		 24#include <media/v4l2-ioctl.h>
25#include <media/v4l2-device.h>
26#include <media/v4l2-ctrls.h>
6e239399 27#include <media/v4l2-event.h>
0996517c
HV		 28#include <media/v4l2-dev.h>
29
ddac5c10
HV		 30#define has_op(master, op) \
31 (master->ops && master->ops->op)
54c911eb 32#define call_op(master, op) \
ddac5c10 33 (has_op(master, op) ? master->ops->op(master) : 0)
54c911eb 34
0996517c 35/* Internal temporary helper struct, one for each v4l2_ext_control */
eb5b16ef
HV		 36struct v4l2_ctrl_helper {
37 /* Pointer to the control reference of the master control */
38 struct v4l2_ctrl_ref *mref;
0996517c
HV		 39 /* The control corresponding to the v4l2_ext_control ID field. */
40 struct v4l2_ctrl *ctrl;
eb5b16ef
HV		 41 /* v4l2_ext_control index of the next control belonging to the
42 same cluster, or 0 if there isn't any. */
43 u32 next;
0996517c
HV		 44};
45
72d877ca 46/* Small helper function to determine if the autocluster is set to manual
88365105 47 mode. */
72d877ca
HV		 48static bool is_cur_manual(const struct v4l2_ctrl *master)
49{
50 return master->is_auto && master->cur.val == master->manual_mode_value;
51}
52
53/* Same as above, but this checks the against the new value instead of the
54 current value. */
55static bool is_new_manual(const struct v4l2_ctrl *master)
56{
57 return master->is_auto && master->val == master->manual_mode_value;
58}
59
0996517c
HV		 60/* Returns NULL or a character pointer array containing the menu for
61 the given control ID. The pointer array ends with a NULL pointer.
62 An empty string signifies a menu entry that is invalid. This allows
63 drivers to disable certain options if it is not supported. */
513521ea 64const char * const *v4l2_ctrl_get_menu(u32 id)
0996517c 65{
513521ea 66 static const char * const mpeg_audio_sampling_freq[] = {
0996517c
HV		 67 "44.1 kHz",
68 "48 kHz",
69 "32 kHz",
70 NULL
71 };
513521ea 72 static const char * const mpeg_audio_encoding[] = {
0996517c
HV		 73 "MPEG-1/2 Layer I",
74 "MPEG-1/2 Layer II",
75 "MPEG-1/2 Layer III",
76 "MPEG-2/4 AAC",
77 "AC-3",
78 NULL
79 };
513521ea 80 static const char * const mpeg_audio_l1_bitrate[] = {
0996517c
HV		 81 "32 kbps",
82 "64 kbps",
83 "96 kbps",
84 "128 kbps",
85 "160 kbps",
86 "192 kbps",
87 "224 kbps",
88 "256 kbps",
89 "288 kbps",
90 "320 kbps",
91 "352 kbps",
92 "384 kbps",
93 "416 kbps",
94 "448 kbps",
95 NULL
96 };
513521ea 97 static const char * const mpeg_audio_l2_bitrate[] = {
0996517c
HV		 98 "32 kbps",
99 "48 kbps",
100 "56 kbps",
101 "64 kbps",
102 "80 kbps",
103 "96 kbps",
104 "112 kbps",
105 "128 kbps",
106 "160 kbps",
107 "192 kbps",
108 "224 kbps",
109 "256 kbps",
110 "320 kbps",
111 "384 kbps",
112 NULL
113 };
513521ea 114 static const char * const mpeg_audio_l3_bitrate[] = {
0996517c
HV		 115 "32 kbps",
116 "40 kbps",
117 "48 kbps",
118 "56 kbps",
119 "64 kbps",
120 "80 kbps",
121 "96 kbps",
122 "112 kbps",
123 "128 kbps",
124 "160 kbps",
125 "192 kbps",
126 "224 kbps",
127 "256 kbps",
128 "320 kbps",
129 NULL
130 };
513521ea 131 static const char * const mpeg_audio_ac3_bitrate[] = {
0996517c
HV		 132 "32 kbps",
133 "40 kbps",
134 "48 kbps",
135 "56 kbps",
136 "64 kbps",
137 "80 kbps",
138 "96 kbps",
139 "112 kbps",
140 "128 kbps",
141 "160 kbps",
142 "192 kbps",
143 "224 kbps",
144 "256 kbps",
145 "320 kbps",
146 "384 kbps",
147 "448 kbps",
148 "512 kbps",
149 "576 kbps",
150 "640 kbps",
151 NULL
152 };
513521ea 153 static const char * const mpeg_audio_mode[] = {
0996517c
HV		 154 "Stereo",
155 "Joint Stereo",
156 "Dual",
157 "Mono",
158 NULL
159 };
513521ea 160 static const char * const mpeg_audio_mode_extension[] = {
0996517c
HV		 161 "Bound 4",
162 "Bound 8",
163 "Bound 12",
164 "Bound 16",
165 NULL
166 };
513521ea 167 static const char * const mpeg_audio_emphasis[] = {
0996517c
HV		 168 "No Emphasis",
169 "50/15 us",
170 "CCITT J17",
171 NULL
172 };
513521ea 173 static const char * const mpeg_audio_crc[] = {
0996517c
HV		 174 "No CRC",
175 "16-bit CRC",
176 NULL
177 };
24c19a21
HV		 178 static const char * const mpeg_audio_dec_playback[] = {
179 "Auto",
180 "Stereo",
181 "Left",
182 "Right",
183 "Mono",
184 "Swapped Stereo",
185 NULL
186 };
513521ea 187 static const char * const mpeg_video_encoding[] = {
0996517c
HV		 188 "MPEG-1",
189 "MPEG-2",
190 "MPEG-4 AVC",
191 NULL
192 };
513521ea 193 static const char * const mpeg_video_aspect[] = {
0996517c
HV		 194 "1x1",
195 "4x3",
196 "16x9",
197 "2.21x1",
198 NULL
199 };
513521ea 200 static const char * const mpeg_video_bitrate_mode[] = {
0996517c
HV		 201 "Variable Bitrate",
202 "Constant Bitrate",
203 NULL
204 };
513521ea 205 static const char * const mpeg_stream_type[] = {
0996517c
HV		 206 "MPEG-2 Program Stream",
207 "MPEG-2 Transport Stream",
208 "MPEG-1 System Stream",
209 "MPEG-2 DVD-compatible Stream",
210 "MPEG-1 VCD-compatible Stream",
211 "MPEG-2 SVCD-compatible Stream",
212 NULL
213 };
513521ea 214 static const char * const mpeg_stream_vbi_fmt[] = {
0996517c 215 "No VBI",
064f5096 216 "Private Packet, IVTV Format",
0996517c
HV		 217 NULL
218 };
513521ea 219 static const char * const camera_power_line_frequency[] = {
0996517c
HV		 220 "Disabled",
221 "50 Hz",
222 "60 Hz",
d26a6635 223 "Auto",
0996517c
HV		 224 NULL
225 };
513521ea 226 static const char * const camera_exposure_auto[] = {
0996517c
HV		 227 "Auto Mode",
228 "Manual Mode",
229 "Shutter Priority Mode",
230 "Aperture Priority Mode",
231 NULL
232 };
cf072139
SN		 233 static const char * const camera_exposure_metering[] = {
234 "Average",
235 "Center Weighted",
236 "Spot",
237 NULL
238 };
2272ab65
SN		 239 static const char * const camera_auto_focus_range[] = {
240 "Auto",
241 "Normal",
242 "Macro",
243 "Infinity",
244 NULL
245 };
513521ea 246 static const char * const colorfx[] = {
0996517c
HV		 247 "None",
248 "Black & White",
249 "Sepia",
250 "Negative",
251 "Emboss",
252 "Sketch",
064f5096
KD		 253 "Sky Blue",
254 "Grass Green",
255 "Skin Whiten",
0996517c 256 "Vivid",
6491d1ad
SN		 257 "Aqua",
258 "Art Freeze",
259 "Silhouette",
260 "Solarization",
261 "Antique",
262 "Set Cb/Cr",
0996517c
HV		 263 NULL
264 };
e40a0573
SN		 265 static const char * const auto_n_preset_white_balance[] = {
266 "Manual",
267 "Auto",
268 "Incandescent",
269 "Fluorescent",
270 "Fluorescent H",
271 "Horizon",
272 "Daylight",
273 "Flash",
274 "Cloudy",
275 "Shade",
276 NULL,
277 };
7f84ad8b
SN		 278 static const char * const camera_iso_sensitivity_auto[] = {
279 "Manual",
280 "Auto",
281 NULL
282 };
0bf6b7dc
SN		 283 static const char * const scene_mode[] = {
284 "None",
285 "Backlight",
286 "Beach/Snow",
287 "Candle Light",
288 "Dusk/Dawn",
289 "Fall Colors",
290 "Fireworks",
291 "Landscape",
292 "Night",
293 "Party/Indoor",
294 "Portrait",
295 "Sports",
296 "Sunset",
297 "Text",
298 NULL
299 };
513521ea 300 static const char * const tune_preemphasis[] = {
064f5096 301 "No Preemphasis",
f769c260
HV		 302 "50 Microseconds",
303 "75 Microseconds",
0996517c
HV		 304 NULL,
305 };
064f5096
KD		 306 static const char * const header_mode[] = {
307 "Separate Buffer",
308 "Joined With 1st Frame",
309 NULL,
310 };
311 static const char * const multi_slice[] = {
312 "Single",
313 "Max Macroblocks",
314 "Max Bytes",
315 NULL,
316 };
317 static const char * const entropy_mode[] = {
318 "CAVLC",
319 "CABAC",
320 NULL,
321 };
322 static const char * const mpeg_h264_level[] = {
323 "1",
324 "1b",
325 "1.1",
326 "1.2",
327 "1.3",
328 "2",
329 "2.1",
330 "2.2",
331 "3",
332 "3.1",
333 "3.2",
334 "4",
335 "4.1",
336 "4.2",
337 "5",
338 "5.1",
339 NULL,
340 };
341 static const char * const h264_loop_filter[] = {
342 "Enabled",
343 "Disabled",
344 "Disabled at Slice Boundary",
345 NULL,
346 };
347 static const char * const h264_profile[] = {
348 "Baseline",
349 "Constrained Baseline",
350 "Main",
351 "Extended",
352 "High",
353 "High 10",
354 "High 422",
355 "High 444 Predictive",
356 "High 10 Intra",
357 "High 422 Intra",
358 "High 444 Intra",
359 "CAVLC 444 Intra",
360 "Scalable Baseline",
361 "Scalable High",
362 "Scalable High Intra",
363 "Multiview High",
364 NULL,
365 };
366 static const char * const vui_sar_idc[] = {
367 "Unspecified",
368 "1:1",
369 "12:11",
370 "10:11",
371 "16:11",
372 "40:33",
373 "24:11",
374 "20:11",
375 "32:11",
376 "80:33",
377 "18:11",
378 "15:11",
379 "64:33",
380 "160:99",
381 "4:3",
382 "3:2",
383 "2:1",
384 "Extended SAR",
385 NULL,
386 };
2e81dde9
AK		 387 static const char * const h264_fp_arrangement_type[] = {
388 "Checkerboard",
389 "Column",
390 "Row",
391 "Side by Side",
392 "Top Bottom",
393 "Temporal",
394 NULL,
395 };
396 static const char * const h264_fmo_map_type[] = {
397 "Interleaved Slices",
398 "Scattered Slices",
399 "Foreground with Leftover",
400 "Box Out",
401 "Raster Scan",
402 "Wipe Scan",
403 "Explicit",
404 NULL,
405 };
064f5096
KD		 406 static const char * const mpeg_mpeg4_level[] = {
407 "0",
408 "0b",
409 "1",
410 "2",
411 "3",
412 "3b",
413 "4",
414 "5",
415 NULL,
416 };
417 static const char * const mpeg4_profile[] = {
418 "Simple",
f769c260 419 "Advanced Simple",
064f5096
KD		 420 "Core",
421 "Simple Scalable",
422 "Advanced Coding Efficency",
423 NULL,
424 };
425
0b159acd
SA		 426 static const char * const flash_led_mode[] = {
427 "Off",
428 "Flash",
429 "Torch",
430 NULL,
431 };
432 static const char * const flash_strobe_source[] = {
433 "Software",
434 "External",
435 NULL,
436 };
0996517c 437
c7361ae1
SN		 438 static const char * const jpeg_chroma_subsampling[] = {
439 "4:4:4",
440 "4:2:2",
441 "4:2:0",
442 "4:1:1",
443 "4:1:0",
444 "Gray",
445 NULL,
446 };
977ebec7
HV		 447 static const char * const dv_tx_mode[] = {
448 "DVI-D",
449 "HDMI",
450 NULL,
451 };
452 static const char * const dv_rgb_range[] = {
453 "Automatic",
454 "RGB limited range (16-235)",
455 "RGB full range (0-255)",
456 NULL,
457 };
458
c7361ae1 459
0996517c
HV		 460 switch (id) {
461 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
462 return mpeg_audio_sampling_freq;
463 case V4L2_CID_MPEG_AUDIO_ENCODING:
464 return mpeg_audio_encoding;
465 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
466 return mpeg_audio_l1_bitrate;
467 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
468 return mpeg_audio_l2_bitrate;
469 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
470 return mpeg_audio_l3_bitrate;
471 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
472 return mpeg_audio_ac3_bitrate;
473 case V4L2_CID_MPEG_AUDIO_MODE:
474 return mpeg_audio_mode;
475 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
476 return mpeg_audio_mode_extension;
477 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
478 return mpeg_audio_emphasis;
479 case V4L2_CID_MPEG_AUDIO_CRC:
480 return mpeg_audio_crc;
24c19a21
HV		 481 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
482 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
483 return mpeg_audio_dec_playback;
0996517c
HV		 484 case V4L2_CID_MPEG_VIDEO_ENCODING:
485 return mpeg_video_encoding;
486 case V4L2_CID_MPEG_VIDEO_ASPECT:
487 return mpeg_video_aspect;
488 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
489 return mpeg_video_bitrate_mode;
490 case V4L2_CID_MPEG_STREAM_TYPE:
491 return mpeg_stream_type;
492 case V4L2_CID_MPEG_STREAM_VBI_FMT:
493 return mpeg_stream_vbi_fmt;
494 case V4L2_CID_POWER_LINE_FREQUENCY:
495 return camera_power_line_frequency;
496 case V4L2_CID_EXPOSURE_AUTO:
497 return camera_exposure_auto;
cf072139
SN		 498 case V4L2_CID_EXPOSURE_METERING:
499 return camera_exposure_metering;
2272ab65
SN		 500 case V4L2_CID_AUTO_FOCUS_RANGE:
501 return camera_auto_focus_range;
0996517c
HV		 502 case V4L2_CID_COLORFX:
503 return colorfx;
e40a0573
SN		 504 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
505 return auto_n_preset_white_balance;
7f84ad8b
SN		 506 case V4L2_CID_ISO_SENSITIVITY_AUTO:
507 return camera_iso_sensitivity_auto;
0bf6b7dc
SN		 508 case V4L2_CID_SCENE_MODE:
509 return scene_mode;
0996517c
HV		 510 case V4L2_CID_TUNE_PREEMPHASIS:
511 return tune_preemphasis;
0b159acd
SA		 512 case V4L2_CID_FLASH_LED_MODE:
513 return flash_led_mode;
514 case V4L2_CID_FLASH_STROBE_SOURCE:
515 return flash_strobe_source;
064f5096
KD		 516 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
517 return header_mode;
518 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
519 return multi_slice;
520 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
521 return entropy_mode;
522 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
523 return mpeg_h264_level;
524 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
525 return h264_loop_filter;
526 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
527 return h264_profile;
528 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
529 return vui_sar_idc;
2e81dde9
AK		 530 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
531 return h264_fp_arrangement_type;
532 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
533 return h264_fmo_map_type;
064f5096
KD		 534 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
535 return mpeg_mpeg4_level;
536 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
537 return mpeg4_profile;
c7361ae1
SN		 538 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
539 return jpeg_chroma_subsampling;
977ebec7
HV		 540 case V4L2_CID_DV_TX_MODE:
541 return dv_tx_mode;
542 case V4L2_CID_DV_TX_RGB_RANGE:
543 case V4L2_CID_DV_RX_RGB_RANGE:
544 return dv_rgb_range;
c7361ae1 545
0996517c
HV		 546 default:
547 return NULL;
548 }
549}
550EXPORT_SYMBOL(v4l2_ctrl_get_menu);
551
552/* Return the control name. */
553const char *v4l2_ctrl_get_name(u32 id)
554{
555 switch (id) {
556 /* USER controls */
6c8d6111 557 /* Keep the order of the 'case's the same as in videodev2.h! */
6dd5aff3
MCC		 558 case V4L2_CID_USER_CLASS: return "User Controls";
559 case V4L2_CID_BRIGHTNESS: return "Brightness";
560 case V4L2_CID_CONTRAST: return "Contrast";
561 case V4L2_CID_SATURATION: return "Saturation";
562 case V4L2_CID_HUE: return "Hue";
563 case V4L2_CID_AUDIO_VOLUME: return "Volume";
564 case V4L2_CID_AUDIO_BALANCE: return "Balance";
565 case V4L2_CID_AUDIO_BASS: return "Bass";
566 case V4L2_CID_AUDIO_TREBLE: return "Treble";
567 case V4L2_CID_AUDIO_MUTE: return "Mute";
568 case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
0996517c
HV		 569 case V4L2_CID_BLACK_LEVEL: return "Black Level";
570 case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic";
571 case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance";
572 case V4L2_CID_RED_BALANCE: return "Red Balance";
573 case V4L2_CID_BLUE_BALANCE: return "Blue Balance";
574 case V4L2_CID_GAMMA: return "Gamma";
575 case V4L2_CID_EXPOSURE: return "Exposure";
576 case V4L2_CID_AUTOGAIN: return "Gain, Automatic";
577 case V4L2_CID_GAIN: return "Gain";
578 case V4L2_CID_HFLIP: return "Horizontal Flip";
579 case V4L2_CID_VFLIP: return "Vertical Flip";
0996517c
HV		 580 case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency";
581 case V4L2_CID_HUE_AUTO: return "Hue, Automatic";
582 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
583 case V4L2_CID_SHARPNESS: return "Sharpness";
584 case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation";
585 case V4L2_CID_CHROMA_AGC: return "Chroma AGC";
0996517c
HV		 586 case V4L2_CID_COLOR_KILLER: return "Color Killer";
587 case V4L2_CID_COLORFX: return "Color Effects";
588 case V4L2_CID_AUTOBRIGHTNESS: return "Brightness, Automatic";
589 case V4L2_CID_BAND_STOP_FILTER: return "Band-Stop Filter";
590 case V4L2_CID_ROTATE: return "Rotate";
591 case V4L2_CID_BG_COLOR: return "Background Color";
6c8d6111 592 case V4L2_CID_CHROMA_GAIN: return "Chroma Gain";
008d35f2
JFM		 593 case V4L2_CID_ILLUMINATORS_1: return "Illuminator 1";
594 case V4L2_CID_ILLUMINATORS_2: return "Illuminator 2";
f08aacf8
HV		 595 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: return "Min Number of Capture Buffers";
596 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: return "Min Number of Output Buffers";
cc1d3272 597 case V4L2_CID_ALPHA_COMPONENT: return "Alpha Component";
6491d1ad 598 case V4L2_CID_COLORFX_CBCR: return "Color Effects, CbCr";
0996517c
HV		 599
600 /* MPEG controls */
6c8d6111 601 /* Keep the order of the 'case's the same as in videodev2.h! */
6dd5aff3
MCC		 602 case V4L2_CID_MPEG_CLASS: return "MPEG Encoder Controls";
603 case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type";
604 case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID";
605 case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID";
606 case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID";
607 case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID";
6c8d6111
HV		 608 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
609 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
610 case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format";
0996517c 611 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
6dd5aff3
MCC		 612 case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding";
613 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate";
614 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate";
615 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate";
616 case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode";
0996517c 617 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
6dd5aff3
MCC		 618 case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis";
619 case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC";
620 case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute";
621 case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate";
622 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate";
24c19a21
HV		 623 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: return "Audio Playback";
624 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: return "Audio Multilingual Playback";
6dd5aff3
MCC		 625 case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding";
626 case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect";
627 case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames";
628 case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size";
629 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure";
630 case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown";
631 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode";
632 case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate";
633 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate";
0996517c 634 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
6dd5aff3 635 case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute";
0996517c 636 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV";
064f5096
KD		 637 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: return "Decoder Slice Interface";
638 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: return "MPEG4 Loop Filter Enable";
f08aacf8 639 case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB: return "Number of Intra Refresh MBs";
064f5096
KD		 640 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: return "Frame Level Rate Control Enable";
641 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: return "H264 MB Level Rate Control";
642 case V4L2_CID_MPEG_VIDEO_HEADER_MODE: return "Sequence Header Mode";
f08aacf8 643 case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC: return "Max Number of Reference Pics";
064f5096 644 case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP: return "H263 I-Frame QP Value";
f08aacf8
HV		 645 case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP: return "H263 P-Frame QP Value";
646 case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP: return "H263 B-Frame QP Value";
064f5096
KD		 647 case V4L2_CID_MPEG_VIDEO_H263_MIN_QP: return "H263 Minimum QP Value";
648 case V4L2_CID_MPEG_VIDEO_H263_MAX_QP: return "H263 Maximum QP Value";
649 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP: return "H264 I-Frame QP Value";
f08aacf8
HV		 650 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP: return "H264 P-Frame QP Value";
651 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP: return "H264 B-Frame QP Value";
064f5096
KD		 652 case V4L2_CID_MPEG_VIDEO_H264_MAX_QP: return "H264 Maximum QP Value";
653 case V4L2_CID_MPEG_VIDEO_H264_MIN_QP: return "H264 Minimum QP Value";
654 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: return "H264 8x8 Transform Enable";
655 case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE: return "H264 CPB Buffer Size";
f08aacf8
HV		 656 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: return "H264 Entropy Mode";
657 case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD: return "H264 I-Frame Period";
064f5096
KD		 658 case V4L2_CID_MPEG_VIDEO_H264_LEVEL: return "H264 Level";
659 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA: return "H264 Loop Filter Alpha Offset";
660 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA: return "H264 Loop Filter Beta Offset";
661 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: return "H264 Loop Filter Mode";
662 case V4L2_CID_MPEG_VIDEO_H264_PROFILE: return "H264 Profile";
663 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT: return "Vertical Size of SAR";
664 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH: return "Horizontal Size of SAR";
665 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: return "Aspect Ratio VUI Enable";
666 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: return "VUI Aspect Ratio IDC";
2e81dde9
AK		 667 case V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING: return "H264 Enable Frame Packing SEI";
668 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0: return "H264 Set Curr. Frame as Frame0";
669 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE: return "H264 FP Arrangement Type";
670 case V4L2_CID_MPEG_VIDEO_H264_FMO: return "H264 Flexible MB Ordering";
671 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE: return "H264 Map Type for FMO";
672 case V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP: return "H264 FMO Number of Slice Groups";
673 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION: return "H264 FMO Direction of Change";
674 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE: return "H264 FMO Size of 1st Slice Grp";
675 case V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH: return "H264 FMO No. of Consecutive MBs";
676 case V4L2_CID_MPEG_VIDEO_H264_ASO: return "H264 Arbitrary Slice Ordering";
677 case V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER: return "H264 ASO Slice Order";
678 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING: return "Enable H264 Hierarchical Coding";
679 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE: return "H264 Hierarchical Coding Type";
680 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER:return "H264 Number of HC Layers";
681 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP:
682 return "H264 Set QP Value for HC Layers";
064f5096 683 case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value";
f08aacf8
HV		 684 case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP: return "MPEG4 P-Frame QP Value";
685 case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP: return "MPEG4 B-Frame QP Value";
064f5096
KD		 686 case V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP: return "MPEG4 Minimum QP Value";
687 case V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP: return "MPEG4 Maximum QP Value";
688 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: return "MPEG4 Level";
689 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: return "MPEG4 Profile";
690 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: return "Quarter Pixel Search Enable";
f08aacf8
HV		 691 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES: return "Maximum Bytes in a Slice";
692 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB: return "Number of MBs in a Slice";
693 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: return "Slice Partitioning Method";
064f5096 694 case V4L2_CID_MPEG_VIDEO_VBV_SIZE: return "VBV Buffer Size";
24c19a21
HV		 695 case V4L2_CID_MPEG_VIDEO_DEC_PTS: return "Video Decoder PTS";
696 case V4L2_CID_MPEG_VIDEO_DEC_FRAME: return "Video Decoder Frame Count";
2e81dde9 697 case V4L2_CID_MPEG_VIDEO_VBV_DELAY: return "Initial Delay for VBV Control";
0996517c
HV		 698
699 /* CAMERA controls */
6c8d6111 700 /* Keep the order of the 'case's the same as in videodev2.h! */
0996517c
HV		 701 case V4L2_CID_CAMERA_CLASS: return "Camera Controls";
702 case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure";
703 case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute";
704 case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate";
705 case V4L2_CID_PAN_RELATIVE: return "Pan, Relative";
706 case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative";
707 case V4L2_CID_PAN_RESET: return "Pan, Reset";
708 case V4L2_CID_TILT_RESET: return "Tilt, Reset";
709 case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute";
710 case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute";
711 case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute";
712 case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative";
2272ab65 713 case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic Continuous";
0996517c
HV		 714 case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute";
715 case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative";
716 case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous";
717 case V4L2_CID_PRIVACY: return "Privacy";
6c8d6111
HV		 718 case V4L2_CID_IRIS_ABSOLUTE: return "Iris, Absolute";
719 case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative";
d58083c9 720 case V4L2_CID_AUTO_EXPOSURE_BIAS: return "Auto Exposure, Bias";
e40a0573 721 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: return "White Balance, Auto & Preset";
44d44a1a 722 case V4L2_CID_WIDE_DYNAMIC_RANGE: return "Wide Dynamic Range";
82b3056c 723 case V4L2_CID_IMAGE_STABILIZATION: return "Image Stabilization";
7f84ad8b
SN		 724 case V4L2_CID_ISO_SENSITIVITY: return "ISO Sensitivity";
725 case V4L2_CID_ISO_SENSITIVITY_AUTO: return "ISO Sensitivity, Auto";
cf072139 726 case V4L2_CID_EXPOSURE_METERING: return "Exposure, Metering Mode";
0bf6b7dc 727 case V4L2_CID_SCENE_MODE: return "Scene Mode";
fc162a09 728 case V4L2_CID_3A_LOCK: return "3A Lock";
2272ab65
SN		 729 case V4L2_CID_AUTO_FOCUS_START: return "Auto Focus, Start";
730 case V4L2_CID_AUTO_FOCUS_STOP: return "Auto Focus, Stop";
731 case V4L2_CID_AUTO_FOCUS_STATUS: return "Auto Focus, Status";
732 case V4L2_CID_AUTO_FOCUS_RANGE: return "Auto Focus, Range";
0996517c
HV		 733
734 /* FM Radio Modulator control */
6c8d6111 735 /* Keep the order of the 'case's the same as in videodev2.h! */
0996517c
HV		 736 case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls";
737 case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation";
738 case V4L2_CID_RDS_TX_PI: return "RDS Program ID";
739 case V4L2_CID_RDS_TX_PTY: return "RDS Program Type";
740 case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name";
741 case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text";
742 case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled";
743 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
744 case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation";
f08aacf8 745 case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Enabled";
0996517c
HV		 746 case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain";
747 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold";
748 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time";
749 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time";
750 case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled";
751 case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation";
752 case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency";
f08aacf8 753 case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-Emphasis";
0996517c
HV		 754 case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level";
755 case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor";
756
0b159acd 757 /* Flash controls */
f08aacf8
HV		 758 case V4L2_CID_FLASH_CLASS: return "Flash Controls";
759 case V4L2_CID_FLASH_LED_MODE: return "LED Mode";
760 case V4L2_CID_FLASH_STROBE_SOURCE: return "Strobe Source";
0b159acd 761 case V4L2_CID_FLASH_STROBE: return "Strobe";
f08aacf8
HV		 762 case V4L2_CID_FLASH_STROBE_STOP: return "Stop Strobe";
763 case V4L2_CID_FLASH_STROBE_STATUS: return "Strobe Status";
764 case V4L2_CID_FLASH_TIMEOUT: return "Strobe Timeout";
765 case V4L2_CID_FLASH_INTENSITY: return "Intensity, Flash Mode";
766 case V4L2_CID_FLASH_TORCH_INTENSITY: return "Intensity, Torch Mode";
767 case V4L2_CID_FLASH_INDICATOR_INTENSITY: return "Intensity, Indicator";
0b159acd
SA		 768 case V4L2_CID_FLASH_FAULT: return "Faults";
769 case V4L2_CID_FLASH_CHARGE: return "Charge";
f08aacf8 770 case V4L2_CID_FLASH_READY: return "Ready to Strobe";
0b159acd 771
c7361ae1
SN		 772 /* JPEG encoder controls */
773 /* Keep the order of the 'case's the same as in videodev2.h! */
774 case V4L2_CID_JPEG_CLASS: return "JPEG Compression Controls";
775 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: return "Chroma Subsampling";
776 case V4L2_CID_JPEG_RESTART_INTERVAL: return "Restart Interval";
777 case V4L2_CID_JPEG_COMPRESSION_QUALITY: return "Compression Quality";
778 case V4L2_CID_JPEG_ACTIVE_MARKER: return "Active Markers";
779
8c9d236e
SA		 780 /* Image source controls */
781 case V4L2_CID_IMAGE_SOURCE_CLASS: return "Image Source Controls";
782 case V4L2_CID_VBLANK: return "Vertical Blanking";
783 case V4L2_CID_HBLANK: return "Horizontal Blanking";
784 case V4L2_CID_ANALOGUE_GAIN: return "Analogue Gain";
785
c643ee13
SA		 786 /* Image processing controls */
787 case V4L2_CID_IMAGE_PROC_CLASS: return "Image Processing Controls";
788 case V4L2_CID_LINK_FREQ: return "Link Frequency";
789 case V4L2_CID_PIXEL_RATE: return "Pixel Rate";
5ebef0fb 790 case V4L2_CID_TEST_PATTERN: return "Test Pattern";
c643ee13 791
977ebec7
HV		 792 /* DV controls */
793 case V4L2_CID_DV_CLASS: return "Digital Video Controls";
794 case V4L2_CID_DV_TX_HOTPLUG: return "Hotplug Present";
795 case V4L2_CID_DV_TX_RXSENSE: return "RxSense Present";
796 case V4L2_CID_DV_TX_EDID_PRESENT: return "EDID Present";
797 case V4L2_CID_DV_TX_MODE: return "Transmit Mode";
798 case V4L2_CID_DV_TX_RGB_RANGE: return "Tx RGB Quantization Range";
799 case V4L2_CID_DV_RX_POWER_PRESENT: return "Power Present";
800 case V4L2_CID_DV_RX_RGB_RANGE: return "Rx RGB Quantization Range";
801
0996517c
HV		 802 default:
803 return NULL;
804 }
805}
806EXPORT_SYMBOL(v4l2_ctrl_get_name);
807
808void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
809 s32 *min, s32 *max, s32 *step, s32 *def, u32 *flags)
810{
811 *name = v4l2_ctrl_get_name(id);
812 *flags = 0;
813
814 switch (id) {
815 case V4L2_CID_AUDIO_MUTE:
816 case V4L2_CID_AUDIO_LOUDNESS:
817 case V4L2_CID_AUTO_WHITE_BALANCE:
818 case V4L2_CID_AUTOGAIN:
819 case V4L2_CID_HFLIP:
820 case V4L2_CID_VFLIP:
821 case V4L2_CID_HUE_AUTO:
822 case V4L2_CID_CHROMA_AGC:
823 case V4L2_CID_COLOR_KILLER:
a2f8b84f 824 case V4L2_CID_AUTOBRIGHTNESS:
0996517c
HV		 825 case V4L2_CID_MPEG_AUDIO_MUTE:
826 case V4L2_CID_MPEG_VIDEO_MUTE:
827 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
828 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
829 case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
830 case V4L2_CID_FOCUS_AUTO:
831 case V4L2_CID_PRIVACY:
832 case V4L2_CID_AUDIO_LIMITER_ENABLED:
833 case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
834 case V4L2_CID_PILOT_TONE_ENABLED:
008d35f2
JFM		 835 case V4L2_CID_ILLUMINATORS_1:
836 case V4L2_CID_ILLUMINATORS_2:
0b159acd
SA		 837 case V4L2_CID_FLASH_STROBE_STATUS:
838 case V4L2_CID_FLASH_CHARGE:
839 case V4L2_CID_FLASH_READY:
064f5096
KD		 840 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
841 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
842 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
843 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
844 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
845 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
846 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
44d44a1a 847 case V4L2_CID_WIDE_DYNAMIC_RANGE:
82b3056c 848 case V4L2_CID_IMAGE_STABILIZATION:
0996517c
HV		 849 *type = V4L2_CTRL_TYPE_BOOLEAN;
850 *min = 0;
851 *max = *step = 1;
852 break;
853 case V4L2_CID_PAN_RESET:
854 case V4L2_CID_TILT_RESET:
0b159acd
SA		 855 case V4L2_CID_FLASH_STROBE:
856 case V4L2_CID_FLASH_STROBE_STOP:
2272ab65
SN		 857 case V4L2_CID_AUTO_FOCUS_START:
858 case V4L2_CID_AUTO_FOCUS_STOP:
0996517c
HV		 859 *type = V4L2_CTRL_TYPE_BUTTON;
860 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
861 *min = *max = *step = *def = 0;
862 break;
863 case V4L2_CID_POWER_LINE_FREQUENCY:
864 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
865 case V4L2_CID_MPEG_AUDIO_ENCODING:
866 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
867 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
868 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
869 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
870 case V4L2_CID_MPEG_AUDIO_MODE:
871 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
872 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
873 case V4L2_CID_MPEG_AUDIO_CRC:
24c19a21
HV		 874 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
875 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
0996517c
HV		 876 case V4L2_CID_MPEG_VIDEO_ENCODING:
877 case V4L2_CID_MPEG_VIDEO_ASPECT:
878 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
879 case V4L2_CID_MPEG_STREAM_TYPE:
880 case V4L2_CID_MPEG_STREAM_VBI_FMT:
881 case V4L2_CID_EXPOSURE_AUTO:
2272ab65 882 case V4L2_CID_AUTO_FOCUS_RANGE:
0996517c 883 case V4L2_CID_COLORFX:
e40a0573 884 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
0996517c 885 case V4L2_CID_TUNE_PREEMPHASIS:
0b159acd
SA		 886 case V4L2_CID_FLASH_LED_MODE:
887 case V4L2_CID_FLASH_STROBE_SOURCE:
064f5096
KD		 888 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
889 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
890 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
891 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
892 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
893 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
894 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
2e81dde9
AK		 895 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
896 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
064f5096
KD		 897 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
898 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
c7361ae1 899 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
7f84ad8b 900 case V4L2_CID_ISO_SENSITIVITY_AUTO:
cf072139 901 case V4L2_CID_EXPOSURE_METERING:
0bf6b7dc 902 case V4L2_CID_SCENE_MODE:
977ebec7
HV		 903 case V4L2_CID_DV_TX_MODE:
904 case V4L2_CID_DV_TX_RGB_RANGE:
905 case V4L2_CID_DV_RX_RGB_RANGE:
5ebef0fb 906 case V4L2_CID_TEST_PATTERN:
0996517c
HV		 907 *type = V4L2_CTRL_TYPE_MENU;
908 break;
c643ee13
SA		 909 case V4L2_CID_LINK_FREQ:
910 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
911 break;
0996517c
HV		 912 case V4L2_CID_RDS_TX_PS_NAME:
913 case V4L2_CID_RDS_TX_RADIO_TEXT:
914 *type = V4L2_CTRL_TYPE_STRING;
915 break;
7f84ad8b 916 case V4L2_CID_ISO_SENSITIVITY:
d58083c9
SN		 917 case V4L2_CID_AUTO_EXPOSURE_BIAS:
918 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
919 break;
0996517c
HV		 920 case V4L2_CID_USER_CLASS:
921 case V4L2_CID_CAMERA_CLASS:
922 case V4L2_CID_MPEG_CLASS:
923 case V4L2_CID_FM_TX_CLASS:
0b159acd 924 case V4L2_CID_FLASH_CLASS:
c7361ae1 925 case V4L2_CID_JPEG_CLASS:
8c9d236e 926 case V4L2_CID_IMAGE_SOURCE_CLASS:
c643ee13 927 case V4L2_CID_IMAGE_PROC_CLASS:
977ebec7 928 case V4L2_CID_DV_CLASS:
0996517c
HV		 929 *type = V4L2_CTRL_TYPE_CTRL_CLASS;
930 /* You can neither read not write these */
931 *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
932 *min = *max = *step = *def = 0;
933 break;
934 case V4L2_CID_BG_COLOR:
935 *type = V4L2_CTRL_TYPE_INTEGER;
936 *step = 1;
937 *min = 0;
938 /* Max is calculated as RGB888 that is 2^24 */
939 *max = 0xFFFFFF;
940 break;
0b159acd 941 case V4L2_CID_FLASH_FAULT:
c7361ae1 942 case V4L2_CID_JPEG_ACTIVE_MARKER:
fc162a09 943 case V4L2_CID_3A_LOCK:
2272ab65 944 case V4L2_CID_AUTO_FOCUS_STATUS:
977ebec7
HV		 945 case V4L2_CID_DV_TX_HOTPLUG:
946 case V4L2_CID_DV_TX_RXSENSE:
947 case V4L2_CID_DV_TX_EDID_PRESENT:
948 case V4L2_CID_DV_RX_POWER_PRESENT:
0b159acd
SA		 949 *type = V4L2_CTRL_TYPE_BITMASK;
950 break;
064f5096
KD		 951 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
952 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:
953 *type = V4L2_CTRL_TYPE_INTEGER;
954 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
955 break;
24c19a21
HV		 956 case V4L2_CID_MPEG_VIDEO_DEC_FRAME:
957 case V4L2_CID_MPEG_VIDEO_DEC_PTS:
c643ee13
SA		 958 *flags |= V4L2_CTRL_FLAG_VOLATILE;
959 /* Fall through */
960 case V4L2_CID_PIXEL_RATE:
24c19a21 961 *type = V4L2_CTRL_TYPE_INTEGER64;
c643ee13 962 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
ca576811 963 *min = *max = *step = *def = 0;
24c19a21 964 break;
0996517c
HV		 965 default:
966 *type = V4L2_CTRL_TYPE_INTEGER;
967 break;
968 }
969 switch (id) {
970 case V4L2_CID_MPEG_AUDIO_ENCODING:
971 case V4L2_CID_MPEG_AUDIO_MODE:
972 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
973 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
974 case V4L2_CID_MPEG_STREAM_TYPE:
975 *flags |= V4L2_CTRL_FLAG_UPDATE;
976 break;
977 case V4L2_CID_AUDIO_VOLUME:
978 case V4L2_CID_AUDIO_BALANCE:
979 case V4L2_CID_AUDIO_BASS:
980 case V4L2_CID_AUDIO_TREBLE:
981 case V4L2_CID_BRIGHTNESS:
982 case V4L2_CID_CONTRAST:
983 case V4L2_CID_SATURATION:
984 case V4L2_CID_HUE:
985 case V4L2_CID_RED_BALANCE:
986 case V4L2_CID_BLUE_BALANCE:
987 case V4L2_CID_GAMMA:
988 case V4L2_CID_SHARPNESS:
989 case V4L2_CID_CHROMA_GAIN:
990 case V4L2_CID_RDS_TX_DEVIATION:
991 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
992 case V4L2_CID_AUDIO_LIMITER_DEVIATION:
993 case V4L2_CID_AUDIO_COMPRESSION_GAIN:
994 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
995 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
996 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
997 case V4L2_CID_PILOT_TONE_DEVIATION:
998 case V4L2_CID_PILOT_TONE_FREQUENCY:
999 case V4L2_CID_TUNE_POWER_LEVEL:
1000 case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
1001 *flags |= V4L2_CTRL_FLAG_SLIDER;
1002 break;
1003 case V4L2_CID_PAN_RELATIVE:
1004 case V4L2_CID_TILT_RELATIVE:
1005 case V4L2_CID_FOCUS_RELATIVE:
1006 case V4L2_CID_IRIS_RELATIVE:
1007 case V4L2_CID_ZOOM_RELATIVE:
1008 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
1009 break;
0b159acd 1010 case V4L2_CID_FLASH_STROBE_STATUS:
2272ab65 1011 case V4L2_CID_AUTO_FOCUS_STATUS:
0b159acd 1012 case V4L2_CID_FLASH_READY:
977ebec7
HV		 1013 case V4L2_CID_DV_TX_HOTPLUG:
1014 case V4L2_CID_DV_TX_RXSENSE:
1015 case V4L2_CID_DV_TX_EDID_PRESENT:
1016 case V4L2_CID_DV_RX_POWER_PRESENT:
0b159acd
SA		 1017 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1018 break;
0996517c
HV		 1019 }
1020}
1021EXPORT_SYMBOL(v4l2_ctrl_fill);
1022
1023/* Helper function to determine whether the control type is compatible with
1024 VIDIOC_G/S_CTRL. */
1025static bool type_is_int(const struct v4l2_ctrl *ctrl)
1026{
1027 switch (ctrl->type) {
1028 case V4L2_CTRL_TYPE_INTEGER64:
1029 case V4L2_CTRL_TYPE_STRING:
1030 /* Nope, these need v4l2_ext_control */
1031 return false;
1032 default:
1033 return true;
1034 }
1035}
1036
6e239399
HV		 1037static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes)
1038{
1039 memset(ev->reserved, 0, sizeof(ev->reserved));
1040 ev->type = V4L2_EVENT_CTRL;
1041 ev->id = ctrl->id;
1042 ev->u.ctrl.changes = changes;
1043 ev->u.ctrl.type = ctrl->type;
1044 ev->u.ctrl.flags = ctrl->flags;
1045 if (ctrl->type == V4L2_CTRL_TYPE_STRING)
1046 ev->u.ctrl.value64 = 0;
1047 else
1048 ev->u.ctrl.value64 = ctrl->cur.val64;
1049 ev->u.ctrl.minimum = ctrl->minimum;
1050 ev->u.ctrl.maximum = ctrl->maximum;
ce580fe5
SA		 1051 if (ctrl->type == V4L2_CTRL_TYPE_MENU
1052 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
6e239399
HV		 1053 ev->u.ctrl.step = 1;
1054 else
1055 ev->u.ctrl.step = ctrl->step;
1056 ev->u.ctrl.default_value = ctrl->default_value;
1057}
1058
1059static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
1060{
1061 struct v4l2_event ev;
77068d36 1062 struct v4l2_subscribed_event *sev;
6e239399 1063
77068d36 1064 if (list_empty(&ctrl->ev_subs))
3f66f0ed 1065 return;
6e239399
HV		 1066 fill_event(&ev, ctrl, changes);
1067
77068d36 1068 list_for_each_entry(sev, &ctrl->ev_subs, node)
e3e72f39
HG		 1069 if (sev->fh != fh ||
1070 (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK))
77068d36 1071 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 1072}
1073
0996517c
HV		 1074/* Helper function: copy the current control value back to the caller */
1075static int cur_to_user(struct v4l2_ext_control *c,
1076 struct v4l2_ctrl *ctrl)
1077{
1078 u32 len;
1079
1080 switch (ctrl->type) {
1081 case V4L2_CTRL_TYPE_STRING:
1082 len = strlen(ctrl->cur.string);
1083 if (c->size < len + 1) {
1084 c->size = len + 1;
1085 return -ENOSPC;
1086 }
1087 return copy_to_user(c->string, ctrl->cur.string,
1088 len + 1) ? -EFAULT : 0;
1089 case V4L2_CTRL_TYPE_INTEGER64:
1090 c->value64 = ctrl->cur.val64;
1091 break;
1092 default:
1093 c->value = ctrl->cur.val;
1094 break;
1095 }
1096 return 0;
1097}
1098
1099/* Helper function: copy the caller-provider value as the new control value */
1100static int user_to_new(struct v4l2_ext_control *c,
1101 struct v4l2_ctrl *ctrl)
1102{
1103 int ret;
1104 u32 size;
1105
2a863793 1106 ctrl->is_new = 1;
0996517c
HV		 1107 switch (ctrl->type) {
1108 case V4L2_CTRL_TYPE_INTEGER64:
1109 ctrl->val64 = c->value64;
1110 break;
1111 case V4L2_CTRL_TYPE_STRING:
1112 size = c->size;
1113 if (size == 0)
1114 return -ERANGE;
1115 if (size > ctrl->maximum + 1)
1116 size = ctrl->maximum + 1;
1117 ret = copy_from_user(ctrl->string, c->string, size);
1118 if (!ret) {
1119 char last = ctrl->string[size - 1];
1120
1121 ctrl->string[size - 1] = 0;
1122 /* If the string was longer than ctrl->maximum,
1123 then return an error. */
1124 if (strlen(ctrl->string) == ctrl->maximum && last)
1125 return -ERANGE;
1126 }
1127 return ret ? -EFAULT : 0;
1128 default:
1129 ctrl->val = c->value;
1130 break;
1131 }
1132 return 0;
1133}
1134
1135/* Helper function: copy the new control value back to the caller */
1136static int new_to_user(struct v4l2_ext_control *c,
1137 struct v4l2_ctrl *ctrl)
1138{
1139 u32 len;
1140
1141 switch (ctrl->type) {
1142 case V4L2_CTRL_TYPE_STRING:
1143 len = strlen(ctrl->string);
1144 if (c->size < len + 1) {
1145 c->size = ctrl->maximum + 1;
1146 return -ENOSPC;
1147 }
1148 return copy_to_user(c->string, ctrl->string,
1149 len + 1) ? -EFAULT : 0;
1150 case V4L2_CTRL_TYPE_INTEGER64:
1151 c->value64 = ctrl->val64;
1152 break;
1153 default:
1154 c->value = ctrl->val;
1155 break;
1156 }
1157 return 0;
1158}
1159
1160/* Copy the new value to the current value. */
2ccbe779 1161static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
0996517c 1162{
6e239399
HV		 1163 bool changed = false;
1164
0996517c
HV		 1165 if (ctrl == NULL)
1166 return;
1167 switch (ctrl->type) {
6e239399
HV		 1168 case V4L2_CTRL_TYPE_BUTTON:
1169 changed = true;
1170 break;
0996517c
HV		 1171 case V4L2_CTRL_TYPE_STRING:
1172 /* strings are always 0-terminated */
6e239399 1173 changed = strcmp(ctrl->string, ctrl->cur.string);
0996517c
HV		 1174 strcpy(ctrl->cur.string, ctrl->string);
1175 break;
1176 case V4L2_CTRL_TYPE_INTEGER64:
6e239399 1177 changed = ctrl->val64 != ctrl->cur.val64;
0996517c
HV		 1178 ctrl->cur.val64 = ctrl->val64;
1179 break;
1180 default:
6e239399 1181 changed = ctrl->val != ctrl->cur.val;
0996517c
HV		 1182 ctrl->cur.val = ctrl->val;
1183 break;
1184 }
2ccbe779
SN		 1185 if (ch_flags & V4L2_EVENT_CTRL_CH_FLAGS) {
1186 /* Note: CH_FLAGS is only set for auto clusters. */
5626b8c7
HV		 1187 ctrl->flags &=
1188 ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE);
1189 if (!is_cur_manual(ctrl->cluster[0])) {
72d877ca 1190 ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
5626b8c7
HV		 1191 if (ctrl->cluster[0]->has_volatiles)
1192 ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
1193 }
1249a3a8 1194 fh = NULL;
72d877ca 1195 }
2ccbe779 1196 if (changed || ch_flags) {
639884a6
HV		 1197 /* If a control was changed that was not one of the controls
1198 modified by the application, then send the event to all. */
1199 if (!ctrl->is_new)
1200 fh = NULL;
6e239399 1201 send_event(fh, ctrl,
2ccbe779 1202 (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | ch_flags);
8ac7a949
HV		 1203 if (ctrl->call_notify && changed && ctrl->handler->notify)
1204 ctrl->handler->notify(ctrl, ctrl->handler->notify_priv);
639884a6 1205 }
0996517c
HV		 1206}
1207
1208/* Copy the current value to the new value */
1209static void cur_to_new(struct v4l2_ctrl *ctrl)
1210{
1211 if (ctrl == NULL)
1212 return;
1213 switch (ctrl->type) {
1214 case V4L2_CTRL_TYPE_STRING:
1215 /* strings are always 0-terminated */
1216 strcpy(ctrl->string, ctrl->cur.string);
1217 break;
1218 case V4L2_CTRL_TYPE_INTEGER64:
1219 ctrl->val64 = ctrl->cur.val64;
1220 break;
1221 default:
1222 ctrl->val = ctrl->cur.val;
1223 break;
1224 }
1225}
1226
1227/* Return non-zero if one or more of the controls in the cluster has a new
1228 value that differs from the current value. */
1229static int cluster_changed(struct v4l2_ctrl *master)
1230{
1231 int diff = 0;
1232 int i;
1233
1234 for (i = 0; !diff && i < master->ncontrols; i++) {
1235 struct v4l2_ctrl *ctrl = master->cluster[i];
1236
1237 if (ctrl == NULL)
1238 continue;
1239 switch (ctrl->type) {
1240 case V4L2_CTRL_TYPE_BUTTON:
1241 /* Button controls are always 'different' */
1242 return 1;
1243 case V4L2_CTRL_TYPE_STRING:
1244 /* strings are always 0-terminated */
1245 diff = strcmp(ctrl->string, ctrl->cur.string);
1246 break;
1247 case V4L2_CTRL_TYPE_INTEGER64:
1248 diff = ctrl->val64 != ctrl->cur.val64;
1249 break;
1250 default:
1251 diff = ctrl->val != ctrl->cur.val;
1252 break;
1253 }
1254 }
1255 return diff;
1256}
1257
2ccbe779
SN		 1258/* Control range checking */
1259static int check_range(enum v4l2_ctrl_type type,
1260 s32 min, s32 max, u32 step, s32 def)
1261{
1262 switch (type) {
1263 case V4L2_CTRL_TYPE_BOOLEAN:
1264 if (step != 1 || max > 1 || min < 0)
1265 return -ERANGE;
1266 /* fall through */
1267 case V4L2_CTRL_TYPE_INTEGER:
1268 if (step <= 0 || min > max || def < min || def > max)
1269 return -ERANGE;
1270 return 0;
1271 case V4L2_CTRL_TYPE_BITMASK:
1272 if (step || min || !max || (def & ~max))
1273 return -ERANGE;
1274 return 0;
1275 case V4L2_CTRL_TYPE_MENU:
1276 case V4L2_CTRL_TYPE_INTEGER_MENU:
1277 if (min > max || def < min || def > max)
1278 return -ERANGE;
1279 /* Note: step == menu_skip_mask for menu controls.
1280 So here we check if the default value is masked out. */
1281 if (step && ((1 << def) & step))
1282 return -EINVAL;
1283 return 0;
1284 case V4L2_CTRL_TYPE_STRING:
1285 if (min > max || min < 0 || step < 1 || def)
1286 return -ERANGE;
1287 return 0;
1288 default:
1289 return 0;
1290 }
1291}
1292
03d5285b
LP		 1293/* Validate a new control */
1294static int validate_new(const struct v4l2_ctrl *ctrl,
1295 struct v4l2_ext_control *c)
0996517c 1296{
03d5285b 1297 size_t len;
0996517c 1298 u32 offset;
03d5285b 1299 s32 val;
0996517c
HV		 1300
1301 switch (ctrl->type) {
1302 case V4L2_CTRL_TYPE_INTEGER:
1303 /* Round towards the closest legal value */
03d5285b
LP		 1304 val = c->value + ctrl->step / 2;
1305 val = clamp(val, ctrl->minimum, ctrl->maximum);
0996517c
HV		 1306 offset = val - ctrl->minimum;
1307 offset = ctrl->step * (offset / ctrl->step);
03d5285b 1308 c->value = ctrl->minimum + offset;
0996517c
HV		 1309 return 0;
1310
1311 case V4L2_CTRL_TYPE_BOOLEAN:
03d5285b 1312 c->value = !!c->value;
0996517c
HV		 1313 return 0;
1314
1315 case V4L2_CTRL_TYPE_MENU:
ce580fe5 1316 case V4L2_CTRL_TYPE_INTEGER_MENU:
03d5285b 1317 if (c->value < ctrl->minimum || c->value > ctrl->maximum)
0996517c 1318 return -ERANGE;
03d5285b 1319 if (ctrl->menu_skip_mask & (1 << c->value))
ce580fe5
SA		 1320 return -EINVAL;
1321 if (ctrl->type == V4L2_CTRL_TYPE_MENU &&
03d5285b 1322 ctrl->qmenu[c->value][0] == '\0')
0996517c
HV		 1323 return -EINVAL;
1324 return 0;
1325
fa4d7096 1326 case V4L2_CTRL_TYPE_BITMASK:
03d5285b 1327 c->value &= ctrl->maximum;
fa4d7096
HV		 1328 return 0;
1329
0996517c
HV		 1330 case V4L2_CTRL_TYPE_BUTTON:
1331 case V4L2_CTRL_TYPE_CTRL_CLASS:
03d5285b 1332 c->value = 0;
0996517c
HV		 1333 return 0;
1334
1335 case V4L2_CTRL_TYPE_INTEGER64:
1336 return 0;
1337
1338 case V4L2_CTRL_TYPE_STRING:
03d5285b 1339 len = strlen(c->string);
0996517c
HV		 1340 if (len < ctrl->minimum)
1341 return -ERANGE;
1342 if ((len - ctrl->minimum) % ctrl->step)
1343 return -ERANGE;
1344 return 0;
1345
1346 default:
1347 return -EINVAL;
1348 }
1349}
1350
1351static inline u32 node2id(struct list_head *node)
1352{
1353 return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id;
1354}
1355
1356/* Set the handler's error code if it wasn't set earlier already */
1357static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)
1358{
1359 if (hdl->error == 0)
1360 hdl->error = err;
1361 return err;
1362}
1363
1364/* Initialize the handler */
1365int v4l2_ctrl_handler_init(struct v4l2_ctrl_handler *hdl,
1366 unsigned nr_of_controls_hint)
1367{
77e7c4e6
SA		 1368 hdl->lock = &hdl->_lock;
1369 mutex_init(hdl->lock);
0996517c
HV		 1370 INIT_LIST_HEAD(&hdl->ctrls);
1371 INIT_LIST_HEAD(&hdl->ctrl_refs);
1372 hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;
9884d7be
TM		 1373 hdl->buckets = kcalloc(hdl->nr_of_buckets, sizeof(hdl->buckets[0]),
1374 GFP_KERNEL);
0996517c
HV		 1375 hdl->error = hdl->buckets ? 0 : -ENOMEM;
1376 return hdl->error;
1377}
1378EXPORT_SYMBOL(v4l2_ctrl_handler_init);
1379
1380/* Free all controls and control refs */
1381void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
1382{
1383 struct v4l2_ctrl_ref *ref, *next_ref;
1384 struct v4l2_ctrl *ctrl, *next_ctrl;
77068d36 1385 struct v4l2_subscribed_event *sev, *next_sev;
0996517c
HV		 1386
1387 if (hdl == NULL || hdl->buckets == NULL)
1388 return;
1389
77e7c4e6 1390 mutex_lock(hdl->lock);
0996517c
HV		 1391 /* Free all nodes */
1392 list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {
1393 list_del(&ref->node);
1394 kfree(ref);
1395 }
1396 /* Free all controls owned by the handler */
1397 list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
1398 list_del(&ctrl->node);
77068d36
HV		 1399 list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
1400 list_del(&sev->node);
0996517c
HV		 1401 kfree(ctrl);
1402 }
1403 kfree(hdl->buckets);
1404 hdl->buckets = NULL;
1405 hdl->cached = NULL;
1406 hdl->error = 0;
77e7c4e6 1407 mutex_unlock(hdl->lock);
0996517c
HV		 1408}
1409EXPORT_SYMBOL(v4l2_ctrl_handler_free);
1410
1411/* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
1412 be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
1413 with applications that do not use the NEXT_CTRL flag.
1414
1415 We just find the n-th private user control. It's O(N), but that should not
1416 be an issue in this particular case. */
1417static struct v4l2_ctrl_ref *find_private_ref(
1418 struct v4l2_ctrl_handler *hdl, u32 id)
1419{
1420 struct v4l2_ctrl_ref *ref;
1421
1422 id -= V4L2_CID_PRIVATE_BASE;
1423 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1424 /* Search for private user controls that are compatible with
1425 VIDIOC_G/S_CTRL. */
1426 if (V4L2_CTRL_ID2CLASS(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
1427 V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
1428 if (!type_is_int(ref->ctrl))
1429 continue;
1430 if (id == 0)
1431 return ref;
1432 id--;
1433 }
1434 }
1435 return NULL;
1436}
1437
1438/* Find a control with the given ID. */
1439static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)
1440{
1441 struct v4l2_ctrl_ref *ref;
1442 int bucket;
1443
1444 id &= V4L2_CTRL_ID_MASK;
1445
1446 /* Old-style private controls need special handling */
1447 if (id >= V4L2_CID_PRIVATE_BASE)
1448 return find_private_ref(hdl, id);
1449 bucket = id % hdl->nr_of_buckets;
1450
1451 /* Simple optimization: cache the last control found */
1452 if (hdl->cached && hdl->cached->ctrl->id == id)
1453 return hdl->cached;
1454
1455 /* Not in cache, search the hash */
1456 ref = hdl->buckets ? hdl->buckets[bucket] : NULL;
1457 while (ref && ref->ctrl->id != id)
1458 ref = ref->next;
1459
1460 if (ref)
1461 hdl->cached = ref; /* cache it! */
1462 return ref;
1463}
1464
1465/* Find a control with the given ID. Take the handler's lock first. */
1466static struct v4l2_ctrl_ref *find_ref_lock(
1467 struct v4l2_ctrl_handler *hdl, u32 id)
1468{
1469 struct v4l2_ctrl_ref *ref = NULL;
1470
1471 if (hdl) {
77e7c4e6 1472 mutex_lock(hdl->lock);
0996517c 1473 ref = find_ref(hdl, id);
77e7c4e6 1474 mutex_unlock(hdl->lock);
0996517c
HV		 1475 }
1476 return ref;
1477}
1478
1479/* Find a control with the given ID. */
1480struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
1481{
1482 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
1483
1484 return ref ? ref->ctrl : NULL;
1485}
1486EXPORT_SYMBOL(v4l2_ctrl_find);
1487
1488/* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
1489static int handler_new_ref(struct v4l2_ctrl_handler *hdl,
1490 struct v4l2_ctrl *ctrl)
1491{
1492 struct v4l2_ctrl_ref *ref;
1493 struct v4l2_ctrl_ref *new_ref;
1494 u32 id = ctrl->id;
1495 u32 class_ctrl = V4L2_CTRL_ID2CLASS(id) | 1;
1496 int bucket = id % hdl->nr_of_buckets; /* which bucket to use */
1497
1498 /* Automatically add the control class if it is not yet present. */
1499 if (id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
1500 if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
1501 return hdl->error;
1502
1503 if (hdl->error)
1504 return hdl->error;
1505
1506 new_ref = kzalloc(sizeof(*new_ref), GFP_KERNEL);
1507 if (!new_ref)
1508 return handler_set_err(hdl, -ENOMEM);
1509 new_ref->ctrl = ctrl;
1510 if (ctrl->handler == hdl) {
1511 /* By default each control starts in a cluster of its own.
1512 new_ref->ctrl is basically a cluster array with one
1513 element, so that's perfect to use as the cluster pointer.
1514 But only do this for the handler that owns the control. */
1515 ctrl->cluster = &new_ref->ctrl;
1516 ctrl->ncontrols = 1;
1517 }
1518
1519 INIT_LIST_HEAD(&new_ref->node);
1520
77e7c4e6 1521 mutex_lock(hdl->lock);
0996517c
HV		 1522
1523 /* Add immediately at the end of the list if the list is empty, or if
1524 the last element in the list has a lower ID.
1525 This ensures that when elements are added in ascending order the
1526 insertion is an O(1) operation. */
1527 if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
1528 list_add_tail(&new_ref->node, &hdl->ctrl_refs);
1529 goto insert_in_hash;
1530 }
1531
1532 /* Find insert position in sorted list */
1533 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1534 if (ref->ctrl->id < id)
1535 continue;
1536 /* Don't add duplicates */
1537 if (ref->ctrl->id == id) {
1538 kfree(new_ref);
1539 goto unlock;
1540 }
1541 list_add(&new_ref->node, ref->node.prev);
1542 break;
1543 }
1544
1545insert_in_hash:
1546 /* Insert the control node in the hash */
1547 new_ref->next = hdl->buckets[bucket];
1548 hdl->buckets[bucket] = new_ref;
1549
1550unlock:
77e7c4e6 1551 mutex_unlock(hdl->lock);
0996517c
HV		 1552 return 0;
1553}
1554
1555/* Add a new control */
1556static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
1557 const struct v4l2_ctrl_ops *ops,
1558 u32 id, const char *name, enum v4l2_ctrl_type type,
1559 s32 min, s32 max, u32 step, s32 def,
ce580fe5
SA		 1560 u32 flags, const char * const *qmenu,
1561 const s64 *qmenu_int, void *priv)
0996517c
HV		 1562{
1563 struct v4l2_ctrl *ctrl;
1564 unsigned sz_extra = 0;
2ccbe779 1565 int err;
0996517c
HV		 1566
1567 if (hdl->error)
1568 return NULL;
1569
1570 /* Sanity checks */
1571 if (id == 0 || name == NULL || id >= V4L2_CID_PRIVATE_BASE ||
0996517c 1572 (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
2ccbe779 1573 (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL)) {
fa4d7096
HV		 1574 handler_set_err(hdl, -ERANGE);
1575 return NULL;
1576 }
2ccbe779
SN		 1577 err = check_range(type, min, max, step, def);
1578 if (err) {
1579 handler_set_err(hdl, err);
02ac0480
HV		 1580 return NULL;
1581 }
fa4d7096
HV		 1582 if (type == V4L2_CTRL_TYPE_BITMASK && ((def & ~max) || min || step)) {
1583 handler_set_err(hdl, -ERANGE);
1584 return NULL;
1585 }
0996517c
HV		 1586
1587 if (type == V4L2_CTRL_TYPE_BUTTON)
1588 flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
1589 else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
1590 flags |= V4L2_CTRL_FLAG_READ_ONLY;
1591 else if (type == V4L2_CTRL_TYPE_STRING)
1592 sz_extra += 2 * (max + 1);
1593
1594 ctrl = kzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
1595 if (ctrl == NULL) {
1596 handler_set_err(hdl, -ENOMEM);
1597 return NULL;
1598 }
1599
1600 INIT_LIST_HEAD(&ctrl->node);
77068d36 1601 INIT_LIST_HEAD(&ctrl->ev_subs);
0996517c
HV		 1602 ctrl->handler = hdl;
1603 ctrl->ops = ops;
1604 ctrl->id = id;
1605 ctrl->name = name;
1606 ctrl->type = type;
1607 ctrl->flags = flags;
1608 ctrl->minimum = min;
1609 ctrl->maximum = max;
1610 ctrl->step = step;
ce580fe5
SA		 1611 if (type == V4L2_CTRL_TYPE_MENU)
1612 ctrl->qmenu = qmenu;
1613 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
1614 ctrl->qmenu_int = qmenu_int;
0996517c
HV		 1615 ctrl->priv = priv;
1616 ctrl->cur.val = ctrl->val = ctrl->default_value = def;
1617
1618 if (ctrl->type == V4L2_CTRL_TYPE_STRING) {
1619 ctrl->cur.string = (char *)&ctrl[1] + sz_extra - (max + 1);
1620 ctrl->string = (char *)&ctrl[1] + sz_extra - 2 * (max + 1);
1621 if (ctrl->minimum)
1622 memset(ctrl->cur.string, ' ', ctrl->minimum);
1623 }
1624 if (handler_new_ref(hdl, ctrl)) {
1625 kfree(ctrl);
1626 return NULL;
1627 }
77e7c4e6 1628 mutex_lock(hdl->lock);
0996517c 1629 list_add_tail(&ctrl->node, &hdl->ctrls);
77e7c4e6 1630 mutex_unlock(hdl->lock);
0996517c
HV		 1631 return ctrl;
1632}
1633
1634struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
1635 const struct v4l2_ctrl_config *cfg, void *priv)
1636{
1637 bool is_menu;
1638 struct v4l2_ctrl *ctrl;
1639 const char *name = cfg->name;
513521ea 1640 const char * const *qmenu = cfg->qmenu;
ce580fe5 1641 const s64 *qmenu_int = cfg->qmenu_int;
0996517c
HV		 1642 enum v4l2_ctrl_type type = cfg->type;
1643 u32 flags = cfg->flags;
1644 s32 min = cfg->min;
1645 s32 max = cfg->max;
1646 u32 step = cfg->step;
1647 s32 def = cfg->def;
1648
1649 if (name == NULL)
1650 v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
1651 &def, &flags);
1652
ce580fe5
SA		 1653 is_menu = (cfg->type == V4L2_CTRL_TYPE_MENU ||
1654 cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU);
0996517c
HV		 1655 if (is_menu)
1656 WARN_ON(step);
1657 else
1658 WARN_ON(cfg->menu_skip_mask);
ce580fe5 1659 if (cfg->type == V4L2_CTRL_TYPE_MENU && qmenu == NULL)
0996517c 1660 qmenu = v4l2_ctrl_get_menu(cfg->id);
ce580fe5
SA		 1661 else if (cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU &&
1662 qmenu_int == NULL) {
1663 handler_set_err(hdl, -EINVAL);
1664 return NULL;
1665 }
0996517c
HV		 1666
1667 ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->id, name,
1668 type, min, max,
1669 is_menu ? cfg->menu_skip_mask : step,
ce580fe5 1670 def, flags, qmenu, qmenu_int, priv);
88365105 1671 if (ctrl)
0996517c 1672 ctrl->is_private = cfg->is_private;
0996517c
HV		 1673 return ctrl;
1674}
1675EXPORT_SYMBOL(v4l2_ctrl_new_custom);
1676
1677/* Helper function for standard non-menu controls */
1678struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
1679 const struct v4l2_ctrl_ops *ops,
1680 u32 id, s32 min, s32 max, u32 step, s32 def)
1681{
1682 const char *name;
1683 enum v4l2_ctrl_type type;
1684 u32 flags;
1685
1686 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
ce580fe5
SA		 1687 if (type == V4L2_CTRL_TYPE_MENU
1688 || type == V4L2_CTRL_TYPE_INTEGER_MENU) {
0996517c
HV		 1689 handler_set_err(hdl, -EINVAL);
1690 return NULL;
1691 }
1692 return v4l2_ctrl_new(hdl, ops, id, name, type,
ce580fe5 1693 min, max, step, def, flags, NULL, NULL, NULL);
0996517c
HV		 1694}
1695EXPORT_SYMBOL(v4l2_ctrl_new_std);
1696
1697/* Helper function for standard menu controls */
1698struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
1699 const struct v4l2_ctrl_ops *ops,
1700 u32 id, s32 max, s32 mask, s32 def)
1701{
513521ea 1702 const char * const *qmenu = v4l2_ctrl_get_menu(id);
0996517c
HV		 1703 const char *name;
1704 enum v4l2_ctrl_type type;
1705 s32 min;
1706 s32 step;
1707 u32 flags;
1708
1709 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
1710 if (type != V4L2_CTRL_TYPE_MENU) {
1711 handler_set_err(hdl, -EINVAL);
1712 return NULL;
1713 }
1714 return v4l2_ctrl_new(hdl, ops, id, name, type,
ce580fe5 1715 0, max, mask, def, flags, qmenu, NULL, NULL);
0996517c
HV		 1716}
1717EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
1718
117a711a
LP		 1719/* Helper function for standard menu controls with driver defined menu */
1720struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,
1721 const struct v4l2_ctrl_ops *ops, u32 id, s32 max,
1722 s32 mask, s32 def, const char * const *qmenu)
1723{
1724 enum v4l2_ctrl_type type;
1725 const char *name;
1726 u32 flags;
1727 s32 step;
1728 s32 min;
1729
1730 /* v4l2_ctrl_new_std_menu_items() should only be called for
1731 * standard controls without a standard menu.
1732 */
1733 if (v4l2_ctrl_get_menu(id)) {
1734 handler_set_err(hdl, -EINVAL);
1735 return NULL;
1736 }
1737
1738 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
1739 if (type != V4L2_CTRL_TYPE_MENU || qmenu == NULL) {
1740 handler_set_err(hdl, -EINVAL);
1741 return NULL;
1742 }
1743 return v4l2_ctrl_new(hdl, ops, id, name, type, 0, max, mask, def,
1744 flags, qmenu, NULL, NULL);
1745
1746}
1747EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items);
1748
515f3287
SN		 1749/* Helper function for standard integer menu controls */
1750struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
1751 const struct v4l2_ctrl_ops *ops,
1752 u32 id, s32 max, s32 def, const s64 *qmenu_int)
1753{
1754 const char *name;
1755 enum v4l2_ctrl_type type;
1756 s32 min;
1757 s32 step;
1758 u32 flags;
1759
1760 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
1761 if (type != V4L2_CTRL_TYPE_INTEGER_MENU) {
1762 handler_set_err(hdl, -EINVAL);
1763 return NULL;
1764 }
1765 return v4l2_ctrl_new(hdl, ops, id, name, type,
1766 0, max, 0, def, flags, NULL, qmenu_int, NULL);
1767}
1768EXPORT_SYMBOL(v4l2_ctrl_new_int_menu);
1769
0996517c
HV		 1770/* Add a control from another handler to this handler */
1771struct v4l2_ctrl *v4l2_ctrl_add_ctrl(struct v4l2_ctrl_handler *hdl,
1772 struct v4l2_ctrl *ctrl)
1773{
1774 if (hdl == NULL || hdl->error)
1775 return NULL;
1776 if (ctrl == NULL) {
1777 handler_set_err(hdl, -EINVAL);
1778 return NULL;
1779 }
1780 if (ctrl->handler == hdl)
1781 return ctrl;
1782 return handler_new_ref(hdl, ctrl) ? NULL : ctrl;
1783}
1784EXPORT_SYMBOL(v4l2_ctrl_add_ctrl);
1785
1786/* Add the controls from another handler to our own. */
1787int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
34a6b7d0
HV		 1788 struct v4l2_ctrl_handler *add,
1789 bool (*filter)(const struct v4l2_ctrl *ctrl))
0996517c 1790{
072e6602 1791 struct v4l2_ctrl_ref *ref;
0996517c
HV		 1792 int ret = 0;
1793
1794 /* Do nothing if either handler is NULL or if they are the same */
1795 if (!hdl || !add || hdl == add)
1796 return 0;
1797 if (hdl->error)
1798 return hdl->error;
77e7c4e6 1799 mutex_lock(add->lock);
072e6602
HV		 1800 list_for_each_entry(ref, &add->ctrl_refs, node) {
1801 struct v4l2_ctrl *ctrl = ref->ctrl;
1802
0996517c
HV		 1803 /* Skip handler-private controls. */
1804 if (ctrl->is_private)
1805 continue;
6e239399
HV		 1806 /* And control classes */
1807 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
1808 continue;
34a6b7d0
HV		 1809 /* Filter any unwanted controls */
1810 if (filter && !filter(ctrl))
1811 continue;
0996517c
HV		 1812 ret = handler_new_ref(hdl, ctrl);
1813 if (ret)
1814 break;
1815 }
77e7c4e6 1816 mutex_unlock(add->lock);
0996517c
HV		 1817 return ret;
1818}
1819EXPORT_SYMBOL(v4l2_ctrl_add_handler);
1820
34a6b7d0
HV		 1821bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl)
1822{
1823 if (V4L2_CTRL_ID2CLASS(ctrl->id) == V4L2_CTRL_CLASS_FM_TX)
1824 return true;
1825 switch (ctrl->id) {
1826 case V4L2_CID_AUDIO_MUTE:
1827 case V4L2_CID_AUDIO_VOLUME:
1828 case V4L2_CID_AUDIO_BALANCE:
1829 case V4L2_CID_AUDIO_BASS:
1830 case V4L2_CID_AUDIO_TREBLE:
1831 case V4L2_CID_AUDIO_LOUDNESS:
1832 return true;
1833 default:
1834 break;
1835 }
1836 return false;
1837}
1838EXPORT_SYMBOL(v4l2_ctrl_radio_filter);
1839
0996517c
HV		 1840/* Cluster controls */
1841void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls)
1842{
5626b8c7 1843 bool has_volatiles = false;
0996517c
HV		 1844 int i;
1845
1846 /* The first control is the master control and it must not be NULL */
72d877ca 1847 BUG_ON(ncontrols == 0 || controls[0] == NULL);
0996517c
HV		 1848
1849 for (i = 0; i < ncontrols; i++) {
1850 if (controls[i]) {
1851 controls[i]->cluster = controls;
1852 controls[i]->ncontrols = ncontrols;
5626b8c7
HV		 1853 if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE)
1854 has_volatiles = true;
0996517c
HV		 1855 }
1856 }
5626b8c7 1857 controls[0]->has_volatiles = has_volatiles;
0996517c
HV		 1858}
1859EXPORT_SYMBOL(v4l2_ctrl_cluster);
1860
72d877ca
HV		 1861void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls,
1862 u8 manual_val, bool set_volatile)
1863{
1864 struct v4l2_ctrl *master = controls[0];
5626b8c7 1865 u32 flag = 0;
72d877ca
HV		 1866 int i;
1867
1868 v4l2_ctrl_cluster(ncontrols, controls);
1869 WARN_ON(ncontrols <= 1);
82a7c049 1870 WARN_ON(manual_val < master->minimum || manual_val > master->maximum);
5626b8c7 1871 WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl));
72d877ca 1872 master->is_auto = true;
5626b8c7 1873 master->has_volatiles = set_volatile;
72d877ca
HV		 1874 master->manual_mode_value = manual_val;
1875 master->flags |= V4L2_CTRL_FLAG_UPDATE;
5626b8c7
HV		 1876
1877 if (!is_cur_manual(master))
1878 flag = V4L2_CTRL_FLAG_INACTIVE |
1879 (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0);
72d877ca
HV		 1880
1881 for (i = 1; i < ncontrols; i++)
88365105 1882 if (controls[i])
72d877ca 1883 controls[i]->flags |= flag;
72d877ca
HV		 1884}
1885EXPORT_SYMBOL(v4l2_ctrl_auto_cluster);
1886
0996517c
HV		 1887/* Activate/deactivate a control. */
1888void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active)
1889{
6e239399
HV		 1890 /* invert since the actual flag is called 'inactive' */
1891 bool inactive = !active;
1892 bool old;
1893
0996517c
HV		 1894 if (ctrl == NULL)
1895 return;
1896
6e239399 1897 if (inactive)
0996517c 1898 /* set V4L2_CTRL_FLAG_INACTIVE */
6e239399 1899 old = test_and_set_bit(4, &ctrl->flags);
0996517c
HV		 1900 else
1901 /* clear V4L2_CTRL_FLAG_INACTIVE */
6e239399
HV		 1902 old = test_and_clear_bit(4, &ctrl->flags);
1903 if (old != inactive)
1904 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
0996517c
HV		 1905}
1906EXPORT_SYMBOL(v4l2_ctrl_activate);
1907
1908/* Grab/ungrab a control.
1909 Typically used when streaming starts and you want to grab controls,
1910 preventing the user from changing them.
1911
1912 Just call this and the framework will block any attempts to change
1913 these controls. */
1914void v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed)
1915{
6e239399
HV		 1916 bool old;
1917
0996517c
HV		 1918 if (ctrl == NULL)
1919 return;
1920
6e239399 1921 v4l2_ctrl_lock(ctrl);
0996517c
HV		 1922 if (grabbed)
1923 /* set V4L2_CTRL_FLAG_GRABBED */
6e239399 1924 old = test_and_set_bit(1, &ctrl->flags);
0996517c
HV		 1925 else
1926 /* clear V4L2_CTRL_FLAG_GRABBED */
6e239399
HV		 1927 old = test_and_clear_bit(1, &ctrl->flags);
1928 if (old != grabbed)
1929 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
1930 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 1931}
1932EXPORT_SYMBOL(v4l2_ctrl_grab);
1933
1934/* Log the control name and value */
1935static void log_ctrl(const struct v4l2_ctrl *ctrl,
1936 const char *prefix, const char *colon)
1937{
0996517c
HV		 1938 if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY))
1939 return;
1940 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
1941 return;
1942
1943 printk(KERN_INFO "%s%s%s: ", prefix, colon, ctrl->name);
1944
1945 switch (ctrl->type) {
1946 case V4L2_CTRL_TYPE_INTEGER:
1947 printk(KERN_CONT "%d", ctrl->cur.val);
1948 break;
1949 case V4L2_CTRL_TYPE_BOOLEAN:
1950 printk(KERN_CONT "%s", ctrl->cur.val ? "true" : "false");
1951 break;
1952 case V4L2_CTRL_TYPE_MENU:
1953 printk(KERN_CONT "%s", ctrl->qmenu[ctrl->cur.val]);
1954 break;
ce580fe5
SA		 1955 case V4L2_CTRL_TYPE_INTEGER_MENU:
1956 printk(KERN_CONT "%lld", ctrl->qmenu_int[ctrl->cur.val]);
1957 break;
fa4d7096
HV		 1958 case V4L2_CTRL_TYPE_BITMASK:
1959 printk(KERN_CONT "0x%08x", ctrl->cur.val);
1960 break;
0996517c
HV		 1961 case V4L2_CTRL_TYPE_INTEGER64:
1962 printk(KERN_CONT "%lld", ctrl->cur.val64);
1963 break;
1964 case V4L2_CTRL_TYPE_STRING:
1965 printk(KERN_CONT "%s", ctrl->cur.string);
1966 break;
1967 default:
1968 printk(KERN_CONT "unknown type %d", ctrl->type);
1969 break;
1970 }
88365105
HV		 1971 if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE |
1972 V4L2_CTRL_FLAG_GRABBED |
1973 V4L2_CTRL_FLAG_VOLATILE)) {
1974 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
1975 printk(KERN_CONT " inactive");
1976 if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)
1977 printk(KERN_CONT " grabbed");
1978 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE)
1979 printk(KERN_CONT " volatile");
1980 }
1981 printk(KERN_CONT "\n");
0996517c
HV		 1982}
1983
1984/* Log all controls owned by the handler */
1985void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
1986 const char *prefix)
1987{
1988 struct v4l2_ctrl *ctrl;
1989 const char *colon = "";
1990 int len;
1991
1992 if (hdl == NULL)
1993 return;
1994 if (prefix == NULL)
1995 prefix = "";
1996 len = strlen(prefix);
1997 if (len && prefix[len - 1] != ' ')
1998 colon = ": ";
77e7c4e6 1999 mutex_lock(hdl->lock);
0996517c
HV		 2000 list_for_each_entry(ctrl, &hdl->ctrls, node)
2001 if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED))
2002 log_ctrl(ctrl, prefix, colon);
77e7c4e6 2003 mutex_unlock(hdl->lock);
0996517c
HV		 2004}
2005EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
2006
ffa9b9f0
SN		 2007int v4l2_ctrl_subdev_log_status(struct v4l2_subdev *sd)
2008{
2009 v4l2_ctrl_handler_log_status(sd->ctrl_handler, sd->name);
2010 return 0;
2011}
2012EXPORT_SYMBOL(v4l2_ctrl_subdev_log_status);
2013
0996517c
HV		 2014/* Call s_ctrl for all controls owned by the handler */
2015int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
2016{
2017 struct v4l2_ctrl *ctrl;
2018 int ret = 0;
2019
2020 if (hdl == NULL)
2021 return 0;
77e7c4e6 2022 mutex_lock(hdl->lock);
0996517c
HV		 2023 list_for_each_entry(ctrl, &hdl->ctrls, node)
2024 ctrl->done = false;
2025
2026 list_for_each_entry(ctrl, &hdl->ctrls, node) {
2027 struct v4l2_ctrl *master = ctrl->cluster[0];
2028 int i;
2029
2030 /* Skip if this control was already handled by a cluster. */
71c6c4c9
HV		 2031 /* Skip button controls and read-only controls. */
2032 if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
2033 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
0996517c
HV		 2034 continue;
2035
2a863793
HV		 2036 for (i = 0; i < master->ncontrols; i++) {
2037 if (master->cluster[i]) {
2038 cur_to_new(master->cluster[i]);
2039 master->cluster[i]->is_new = 1;
71c6c4c9 2040 master->cluster[i]->done = true;
2a863793
HV		 2041 }
2042 }
54c911eb 2043 ret = call_op(master, s_ctrl);
0996517c
HV		 2044 if (ret)
2045 break;
0996517c 2046 }
77e7c4e6 2047 mutex_unlock(hdl->lock);
0996517c
HV		 2048 return ret;
2049}
2050EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
2051
2052/* Implement VIDIOC_QUERYCTRL */
2053int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
2054{
2055 u32 id = qc->id & V4L2_CTRL_ID_MASK;
2056 struct v4l2_ctrl_ref *ref;
2057 struct v4l2_ctrl *ctrl;
2058
2059 if (hdl == NULL)
2060 return -EINVAL;
2061
77e7c4e6 2062 mutex_lock(hdl->lock);
0996517c
HV		 2063
2064 /* Try to find it */
2065 ref = find_ref(hdl, id);
2066
2067 if ((qc->id & V4L2_CTRL_FLAG_NEXT_CTRL) && !list_empty(&hdl->ctrl_refs)) {
2068 /* Find the next control with ID > qc->id */
2069
2070 /* Did we reach the end of the control list? */
2071 if (id >= node2id(hdl->ctrl_refs.prev)) {
2072 ref = NULL; /* Yes, so there is no next control */
2073 } else if (ref) {
2074 /* We found a control with the given ID, so just get
2075 the next one in the list. */
2076 ref = list_entry(ref->node.next, typeof(*ref), node);
2077 } else {
2078 /* No control with the given ID exists, so start
2079 searching for the next largest ID. We know there
2080 is one, otherwise the first 'if' above would have
2081 been true. */
2082 list_for_each_entry(ref, &hdl->ctrl_refs, node)
2083 if (id < ref->ctrl->id)
2084 break;
2085 }
2086 }
77e7c4e6 2087 mutex_unlock(hdl->lock);
0996517c
HV		 2088 if (!ref)
2089 return -EINVAL;
2090
2091 ctrl = ref->ctrl;
2092 memset(qc, 0, sizeof(*qc));
829fb2dc
HV		 2093 if (id >= V4L2_CID_PRIVATE_BASE)
2094 qc->id = id;
2095 else
2096 qc->id = ctrl->id;
0996517c
HV		 2097 strlcpy(qc->name, ctrl->name, sizeof(qc->name));
2098 qc->minimum = ctrl->minimum;
2099 qc->maximum = ctrl->maximum;
2100 qc->default_value = ctrl->default_value;
ce580fe5
SA		 2101 if (ctrl->type == V4L2_CTRL_TYPE_MENU
2102 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
0996517c
HV		 2103 qc->step = 1;
2104 else
2105 qc->step = ctrl->step;
2106 qc->flags = ctrl->flags;
2107 qc->type = ctrl->type;
2108 return 0;
2109}
2110EXPORT_SYMBOL(v4l2_queryctrl);
2111
2112int v4l2_subdev_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
2113{
87a0c94c
HV		 2114 if (qc->id & V4L2_CTRL_FLAG_NEXT_CTRL)
2115 return -EINVAL;
0996517c
HV		 2116 return v4l2_queryctrl(sd->ctrl_handler, qc);
2117}
2118EXPORT_SYMBOL(v4l2_subdev_queryctrl);
2119
2120/* Implement VIDIOC_QUERYMENU */
2121int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
2122{
2123 struct v4l2_ctrl *ctrl;
2124 u32 i = qm->index;
2125
2126 ctrl = v4l2_ctrl_find(hdl, qm->id);
2127 if (!ctrl)
2128 return -EINVAL;
2129
2130 qm->reserved = 0;
2131 /* Sanity checks */
ce580fe5
SA		 2132 switch (ctrl->type) {
2133 case V4L2_CTRL_TYPE_MENU:
2134 if (ctrl->qmenu == NULL)
2135 return -EINVAL;
2136 break;
2137 case V4L2_CTRL_TYPE_INTEGER_MENU:
2138 if (ctrl->qmenu_int == NULL)
2139 return -EINVAL;
2140 break;
2141 default:
2142 return -EINVAL;
2143 }
2144
2145 if (i < ctrl->minimum || i > ctrl->maximum)
0996517c 2146 return -EINVAL;
ce580fe5 2147
0996517c
HV		 2148 /* Use mask to see if this menu item should be skipped */
2149 if (ctrl->menu_skip_mask & (1 << i))
2150 return -EINVAL;
2151 /* Empty menu items should also be skipped */
ce580fe5
SA		 2152 if (ctrl->type == V4L2_CTRL_TYPE_MENU) {
2153 if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0')
2154 return -EINVAL;
2155 strlcpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
2156 } else {
2157 qm->value = ctrl->qmenu_int[i];
2158 }
0996517c
HV		 2159 return 0;
2160}
2161EXPORT_SYMBOL(v4l2_querymenu);
2162
2163int v4l2_subdev_querymenu(struct v4l2_subdev *sd, struct v4l2_querymenu *qm)
2164{
2165 return v4l2_querymenu(sd->ctrl_handler, qm);
2166}
2167EXPORT_SYMBOL(v4l2_subdev_querymenu);
2168
2169
2170
2171/* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS:
2172
2173 It is not a fully atomic operation, just best-effort only. After all, if
2174 multiple controls have to be set through multiple i2c writes (for example)
2175 then some initial writes may succeed while others fail. Thus leaving the
2176 system in an inconsistent state. The question is how much effort you are
2177 willing to spend on trying to make something atomic that really isn't.
2178
2179 From the point of view of an application the main requirement is that
2180 when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an
2181 error should be returned without actually affecting any controls.
2182
2183 If all the values are correct, then it is acceptable to just give up
2184 in case of low-level errors.
2185
2186 It is important though that the application can tell when only a partial
2187 configuration was done. The way we do that is through the error_idx field
2188 of struct v4l2_ext_controls: if that is equal to the count field then no
2189 controls were affected. Otherwise all controls before that index were
2190 successful in performing their 'get' or 'set' operation, the control at
2191 the given index failed, and you don't know what happened with the controls
2192 after the failed one. Since if they were part of a control cluster they
2193 could have been successfully processed (if a cluster member was encountered
2194 at index < error_idx), they could have failed (if a cluster member was at
2195 error_idx), or they may not have been processed yet (if the first cluster
2196 member appeared after error_idx).
2197
2198 It is all fairly theoretical, though. In practice all you can do is to
2199 bail out. If error_idx == count, then it is an application bug. If
2200 error_idx < count then it is only an application bug if the error code was
2201 EBUSY. That usually means that something started streaming just when you
2202 tried to set the controls. In all other cases it is a driver/hardware
2203 problem and all you can do is to retry or bail out.
2204
2205 Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that
2206 never modifies controls the error_idx is just set to whatever control
2207 has an invalid value.
2208 */
2209
2210/* Prepare for the extended g/s/try functions.
2211 Find the controls in the control array and do some basic checks. */
2212static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
2213 struct v4l2_ext_controls *cs,
eb5b16ef 2214 struct v4l2_ctrl_helper *helpers)
0996517c 2215{
eb5b16ef
HV		 2216 struct v4l2_ctrl_helper *h;
2217 bool have_clusters = false;
0996517c
HV		 2218 u32 i;
2219
eb5b16ef 2220 for (i = 0, h = helpers; i < cs->count; i++, h++) {
0996517c 2221 struct v4l2_ext_control *c = &cs->controls[i];
eb5b16ef 2222 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2223 struct v4l2_ctrl *ctrl;
2224 u32 id = c->id & V4L2_CTRL_ID_MASK;
2225
37cd3b73 2226 cs->error_idx = i;
0996517c
HV		 2227
2228 if (cs->ctrl_class && V4L2_CTRL_ID2CLASS(id) != cs->ctrl_class)
2229 return -EINVAL;
2230
2231 /* Old-style private controls are not allowed for
2232 extended controls */
2233 if (id >= V4L2_CID_PRIVATE_BASE)
2234 return -EINVAL;
eb5b16ef
HV		 2235 ref = find_ref_lock(hdl, id);
2236 if (ref == NULL)
0996517c 2237 return -EINVAL;
eb5b16ef 2238 ctrl = ref->ctrl;
0996517c
HV		 2239 if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED)
2240 return -EINVAL;
2241
eb5b16ef
HV		 2242 if (ctrl->cluster[0]->ncontrols > 1)
2243 have_clusters = true;
2244 if (ctrl->cluster[0] != ctrl)
2245 ref = find_ref_lock(hdl, ctrl->cluster[0]->id);
2246 /* Store the ref to the master control of the cluster */
2247 h->mref = ref;
2248 h->ctrl = ctrl;
2249 /* Initially set next to 0, meaning that there is no other
2250 control in this helper array belonging to the same
2251 cluster */
2252 h->next = 0;
0996517c 2253 }
0996517c 2254
eb5b16ef
HV		 2255 /* We are done if there were no controls that belong to a multi-
2256 control cluster. */
2257 if (!have_clusters)
2258 return 0;
0996517c 2259
eb5b16ef
HV		 2260 /* The code below figures out in O(n) time which controls in the list
2261 belong to the same cluster. */
0996517c 2262
eb5b16ef 2263 /* This has to be done with the handler lock taken. */
77e7c4e6 2264 mutex_lock(hdl->lock);
0996517c 2265
eb5b16ef
HV		 2266 /* First zero the helper field in the master control references */
2267 for (i = 0; i < cs->count; i++)
c082266f 2268 helpers[i].mref->helper = NULL;
eb5b16ef
HV		 2269 for (i = 0, h = helpers; i < cs->count; i++, h++) {
2270 struct v4l2_ctrl_ref *mref = h->mref;
2271
2272 /* If the mref->helper is set, then it points to an earlier
2273 helper that belongs to the same cluster. */
2274 if (mref->helper) {
2275 /* Set the next field of mref->helper to the current
2276 index: this means that that earlier helper now
2277 points to the next helper in the same cluster. */
2278 mref->helper->next = i;
2279 /* mref should be set only for the first helper in the
2280 cluster, clear the others. */
2281 h->mref = NULL;
2282 }
2283 /* Point the mref helper to the current helper struct. */
2284 mref->helper = h;
0996517c 2285 }
77e7c4e6 2286 mutex_unlock(hdl->lock);
eb5b16ef 2287 return 0;
0996517c
HV		 2288}
2289
2290/* Handles the corner case where cs->count == 0. It checks whether the
2291 specified control class exists. If that class ID is 0, then it checks
2292 whether there are any controls at all. */
2293static int class_check(struct v4l2_ctrl_handler *hdl, u32 ctrl_class)
2294{
2295 if (ctrl_class == 0)
2296 return list_empty(&hdl->ctrl_refs) ? -EINVAL : 0;
2297 return find_ref_lock(hdl, ctrl_class | 1) ? 0 : -EINVAL;
2298}
2299
2300
2301
2302/* Get extended controls. Allocates the helpers array if needed. */
2303int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
2304{
eb5b16ef
HV		 2305 struct v4l2_ctrl_helper helper[4];
2306 struct v4l2_ctrl_helper *helpers = helper;
0996517c 2307 int ret;
ddac5c10 2308 int i, j;
0996517c
HV		 2309
2310 cs->error_idx = cs->count;
2311 cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
2312
2313 if (hdl == NULL)
2314 return -EINVAL;
2315
2316 if (cs->count == 0)
2317 return class_check(hdl, cs->ctrl_class);
2318
2319 if (cs->count > ARRAY_SIZE(helper)) {
5f0049bd
XW		 2320 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
2321 GFP_KERNEL);
0996517c
HV		 2322 if (helpers == NULL)
2323 return -ENOMEM;
2324 }
2325
37cd3b73
HV		 2326 ret = prepare_ext_ctrls(hdl, cs, helpers);
2327 cs->error_idx = cs->count;
0996517c
HV		 2328
2329 for (i = 0; !ret && i < cs->count; i++)
2330 if (helpers[i].ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2331 ret = -EACCES;
2332
2333 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 2334 int (*ctrl_to_user)(struct v4l2_ext_control *c,
2335 struct v4l2_ctrl *ctrl) = cur_to_user;
2336 struct v4l2_ctrl *master;
0996517c 2337
eb5b16ef 2338 if (helpers[i].mref == NULL)
0996517c
HV		 2339 continue;
2340
eb5b16ef 2341 master = helpers[i].mref->ctrl;
0996517c
HV		 2342 cs->error_idx = i;
2343
2344 v4l2_ctrl_lock(master);
ddac5c10
HV		 2345
2346 /* g_volatile_ctrl will update the new control values */
5626b8c7
HV		 2347 if ((master->flags & V4L2_CTRL_FLAG_VOLATILE) ||
2348 (master->has_volatiles && !is_cur_manual(master))) {
ddac5c10
HV		 2349 for (j = 0; j < master->ncontrols; j++)
2350 cur_to_new(master->cluster[j]);
54c911eb 2351 ret = call_op(master, g_volatile_ctrl);
eb5b16ef 2352 ctrl_to_user = new_to_user;
ddac5c10
HV		 2353 }
2354 /* If OK, then copy the current (for non-volatile controls)
2355 or the new (for volatile controls) control values to the
2356 caller */
eb5b16ef
HV		 2357 if (!ret) {
2358 u32 idx = i;
2359
2360 do {
2361 ret = ctrl_to_user(cs->controls + idx,
2362 helpers[idx].ctrl);
2363 idx = helpers[idx].next;
2364 } while (!ret && idx);
2365 }
0996517c 2366 v4l2_ctrl_unlock(master);
0996517c
HV		 2367 }
2368
2369 if (cs->count > ARRAY_SIZE(helper))
2370 kfree(helpers);
2371 return ret;
2372}
2373EXPORT_SYMBOL(v4l2_g_ext_ctrls);
2374
2375int v4l2_subdev_g_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2376{
2377 return v4l2_g_ext_ctrls(sd->ctrl_handler, cs);
2378}
2379EXPORT_SYMBOL(v4l2_subdev_g_ext_ctrls);
2380
2381/* Helper function to get a single control */
03d5285b 2382static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
0996517c
HV		 2383{
2384 struct v4l2_ctrl *master = ctrl->cluster[0];
2385 int ret = 0;
ddac5c10 2386 int i;
0996517c 2387
03d5285b
LP		 2388 /* String controls are not supported. The new_to_user() and
2389 * cur_to_user() calls below would need to be modified not to access
2390 * userspace memory when called from get_ctrl().
2391 */
2392 if (ctrl->type == V4L2_CTRL_TYPE_STRING)
2393 return -EINVAL;
2394
0996517c
HV		 2395 if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2396 return -EACCES;
2397
2398 v4l2_ctrl_lock(master);
2399 /* g_volatile_ctrl will update the current control values */
5626b8c7 2400 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
ddac5c10
HV		 2401 for (i = 0; i < master->ncontrols; i++)
2402 cur_to_new(master->cluster[i]);
54c911eb 2403 ret = call_op(master, g_volatile_ctrl);
03d5285b 2404 new_to_user(c, ctrl);
ddac5c10 2405 } else {
03d5285b 2406 cur_to_user(c, ctrl);
ddac5c10 2407 }
0996517c
HV		 2408 v4l2_ctrl_unlock(master);
2409 return ret;
2410}
2411
2412int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
2413{
2414 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
03d5285b
LP		 2415 struct v4l2_ext_control c;
2416 int ret;
0996517c
HV		 2417
2418 if (ctrl == NULL || !type_is_int(ctrl))
2419 return -EINVAL;
03d5285b
LP		 2420 ret = get_ctrl(ctrl, &c);
2421 control->value = c.value;
2422 return ret;
0996517c
HV		 2423}
2424EXPORT_SYMBOL(v4l2_g_ctrl);
2425
2426int v4l2_subdev_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
2427{
2428 return v4l2_g_ctrl(sd->ctrl_handler, control);
2429}
2430EXPORT_SYMBOL(v4l2_subdev_g_ctrl);
2431
2432s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl)
2433{
03d5285b 2434 struct v4l2_ext_control c;
0996517c
HV		 2435
2436 /* It's a driver bug if this happens. */
2437 WARN_ON(!type_is_int(ctrl));
03d5285b
LP		 2438 c.value = 0;
2439 get_ctrl(ctrl, &c);
2440 return c.value;
0996517c
HV		 2441}
2442EXPORT_SYMBOL(v4l2_ctrl_g_ctrl);
2443
03d5285b
LP		 2444s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl)
2445{
2446 struct v4l2_ext_control c;
2447
2448 /* It's a driver bug if this happens. */
2449 WARN_ON(ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
2450 c.value = 0;
2451 get_ctrl(ctrl, &c);
2452 return c.value;
2453}
2454EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);
2455
0996517c
HV		 2456
2457/* Core function that calls try/s_ctrl and ensures that the new value is
2458 copied to the current value on a set.
2459 Must be called with ctrl->handler->lock held. */
2ccbe779
SN		 2460static int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
2461 bool set, u32 ch_flags)
0996517c 2462{
72d877ca 2463 bool update_flag;
eb5b16ef 2464 int ret;
0996517c
HV		 2465 int i;
2466
2467 /* Go through the cluster and either validate the new value or
2468 (if no new value was set), copy the current value to the new
2469 value, ensuring a consistent view for the control ops when
2470 called. */
eb5b16ef 2471 for (i = 0; i < master->ncontrols; i++) {
0996517c
HV		 2472 struct v4l2_ctrl *ctrl = master->cluster[i];
2473
2474 if (ctrl == NULL)
2475 continue;
2476
eb5b16ef
HV		 2477 if (!ctrl->is_new) {
2478 cur_to_new(ctrl);
0996517c
HV		 2479 continue;
2480 }
eb5b16ef
HV		 2481 /* Check again: it may have changed since the
2482 previous check in try_or_set_ext_ctrls(). */
2483 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
2484 return -EBUSY;
0996517c
HV		 2485 }
2486
eb5b16ef 2487 ret = call_op(master, try_ctrl);
0996517c
HV		 2488
2489 /* Don't set if there is no change */
72d877ca
HV		 2490 if (ret || !set || !cluster_changed(master))
2491 return ret;
2492 ret = call_op(master, s_ctrl);
72d877ca
HV		 2493 if (ret)
2494 return ret;
2495
eb5b16ef 2496 /* If OK, then make the new values permanent. */
72d877ca
HV		 2497 update_flag = is_cur_manual(master) != is_new_manual(master);
2498 for (i = 0; i < master->ncontrols; i++)
2ccbe779
SN		 2499 new_to_cur(fh, master->cluster[i], ch_flags |
2500 ((update_flag && i > 0) ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
72d877ca 2501 return 0;
0996517c
HV		 2502}
2503
e6402585
HV		 2504/* Validate controls. */
2505static int validate_ctrls(struct v4l2_ext_controls *cs,
2506 struct v4l2_ctrl_helper *helpers, bool set)
0996517c 2507{
e6402585 2508 unsigned i;
0996517c
HV		 2509 int ret = 0;
2510
eb5b16ef 2511 cs->error_idx = cs->count;
0996517c
HV		 2512 for (i = 0; i < cs->count; i++) {
2513 struct v4l2_ctrl *ctrl = helpers[i].ctrl;
2514
e6402585 2515 cs->error_idx = i;
0996517c
HV		 2516
2517 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
2518 return -EACCES;
2519 /* This test is also done in try_set_control_cluster() which
2520 is called in atomic context, so that has the final say,
2521 but it makes sense to do an up-front check as well. Once
2522 an error occurs in try_set_control_cluster() some other
2523 controls may have been set already and we want to do a
2524 best-effort to avoid that. */
2525 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
2526 return -EBUSY;
eb5b16ef
HV		 2527 ret = validate_new(ctrl, &cs->controls[i]);
2528 if (ret)
2529 return ret;
0996517c 2530 }
e6402585
HV		 2531 return 0;
2532}
2533
5626b8c7
HV		 2534/* Obtain the current volatile values of an autocluster and mark them
2535 as new. */
2536static void update_from_auto_cluster(struct v4l2_ctrl *master)
2537{
2538 int i;
2539
2540 for (i = 0; i < master->ncontrols; i++)
2541 cur_to_new(master->cluster[i]);
2542 if (!call_op(master, g_volatile_ctrl))
2543 for (i = 1; i < master->ncontrols; i++)
2544 if (master->cluster[i])
2545 master->cluster[i]->is_new = 1;
2546}
2547
e6402585
HV		 2548/* Try or try-and-set controls */
2549static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
2550 struct v4l2_ext_controls *cs,
2551 bool set)
2552{
2553 struct v4l2_ctrl_helper helper[4];
2554 struct v4l2_ctrl_helper *helpers = helper;
2555 unsigned i, j;
2556 int ret;
2557
2558 cs->error_idx = cs->count;
2559 cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
2560
2561 if (hdl == NULL)
2562 return -EINVAL;
2563
2564 if (cs->count == 0)
2565 return class_check(hdl, cs->ctrl_class);
0996517c 2566
e6402585 2567 if (cs->count > ARRAY_SIZE(helper)) {
0a3475eb
XW		 2568 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
2569 GFP_KERNEL);
e6402585
HV		 2570 if (!helpers)
2571 return -ENOMEM;
2572 }
2573 ret = prepare_ext_ctrls(hdl, cs, helpers);
2574 if (!ret)
2575 ret = validate_ctrls(cs, helpers, set);
2576 if (ret && set)
2577 cs->error_idx = cs->count;
0996517c 2578 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 2579 struct v4l2_ctrl *master;
2580 u32 idx = i;
0996517c 2581
eb5b16ef 2582 if (helpers[i].mref == NULL)
0996517c
HV		 2583 continue;
2584
37cd3b73 2585 cs->error_idx = i;
eb5b16ef
HV		 2586 master = helpers[i].mref->ctrl;
2587 v4l2_ctrl_lock(master);
0996517c 2588
2a863793 2589 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 2590 for (j = 0; j < master->ncontrols; j++)
2591 if (master->cluster[j])
2a863793 2592 master->cluster[j]->is_new = 0;
0996517c 2593
5626b8c7
HV		 2594 /* For volatile autoclusters that are currently in auto mode
2595 we need to discover if it will be set to manual mode.
2596 If so, then we have to copy the current volatile values
2597 first since those will become the new manual values (which
2598 may be overwritten by explicit new values from this set
2599 of controls). */
2600 if (master->is_auto && master->has_volatiles &&
2601 !is_cur_manual(master)) {
2602 /* Pick an initial non-manual value */
2603 s32 new_auto_val = master->manual_mode_value + 1;
2604 u32 tmp_idx = idx;
2605
2606 do {
2607 /* Check if the auto control is part of the
2608 list, and remember the new value. */
2609 if (helpers[tmp_idx].ctrl == master)
2610 new_auto_val = cs->controls[tmp_idx].value;
2611 tmp_idx = helpers[tmp_idx].next;
2612 } while (tmp_idx);
2613 /* If the new value == the manual value, then copy
2614 the current volatile values. */
2615 if (new_auto_val == master->manual_mode_value)
2616 update_from_auto_cluster(master);
2617 }
2618
0996517c 2619 /* Copy the new caller-supplied control values.
2a863793 2620 user_to_new() sets 'is_new' to 1. */
eb5b16ef
HV		 2621 do {
2622 ret = user_to_new(cs->controls + idx, helpers[idx].ctrl);
2623 idx = helpers[idx].next;
2624 } while (!ret && idx);
0996517c
HV		 2625
2626 if (!ret)
2ccbe779 2627 ret = try_or_set_cluster(fh, master, set, 0);
0996517c
HV		 2628
2629 /* Copy the new values back to userspace. */
eb5b16ef
HV		 2630 if (!ret) {
2631 idx = i;
2632 do {
adf41b9b 2633 ret = new_to_user(cs->controls + idx,
e6402585 2634 helpers[idx].ctrl);
eb5b16ef
HV		 2635 idx = helpers[idx].next;
2636 } while (!ret && idx);
2637 }
2638 v4l2_ctrl_unlock(master);
0996517c 2639 }
0996517c 2640
0996517c
HV		 2641 if (cs->count > ARRAY_SIZE(helper))
2642 kfree(helpers);
2643 return ret;
2644}
2645
2646int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
2647{
ab892bac 2648 return try_set_ext_ctrls(NULL, hdl, cs, false);
0996517c
HV		 2649}
2650EXPORT_SYMBOL(v4l2_try_ext_ctrls);
2651
ab892bac
HV		 2652int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
2653 struct v4l2_ext_controls *cs)
0996517c 2654{
ab892bac 2655 return try_set_ext_ctrls(fh, hdl, cs, true);
0996517c
HV		 2656}
2657EXPORT_SYMBOL(v4l2_s_ext_ctrls);
2658
2659int v4l2_subdev_try_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2660{
ab892bac 2661 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, false);
0996517c
HV		 2662}
2663EXPORT_SYMBOL(v4l2_subdev_try_ext_ctrls);
2664
2665int v4l2_subdev_s_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2666{
ab892bac 2667 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, true);
0996517c
HV		 2668}
2669EXPORT_SYMBOL(v4l2_subdev_s_ext_ctrls);
2670
2671/* Helper function for VIDIOC_S_CTRL compatibility */
03d5285b 2672static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
2ccbe779 2673 struct v4l2_ext_control *c, u32 ch_flags)
0996517c
HV		 2674{
2675 struct v4l2_ctrl *master = ctrl->cluster[0];
0996517c
HV		 2676 int i;
2677
03d5285b
LP		 2678 /* String controls are not supported. The user_to_new() and
2679 * cur_to_user() calls below would need to be modified not to access
2680 * userspace memory when called from set_ctrl().
2681 */
2682 if (ctrl->type == V4L2_CTRL_TYPE_STRING)
2683 return -EINVAL;
2684
2a863793 2685 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 2686 for (i = 0; i < master->ncontrols; i++)
2687 if (master->cluster[i])
2a863793 2688 master->cluster[i]->is_new = 0;
0996517c 2689
5626b8c7
HV		 2690 /* For autoclusters with volatiles that are switched from auto to
2691 manual mode we have to update the current volatile values since
2692 those will become the initial manual values after such a switch. */
2693 if (master->is_auto && master->has_volatiles && ctrl == master &&
03d5285b 2694 !is_cur_manual(master) && c->value == master->manual_mode_value)
5626b8c7 2695 update_from_auto_cluster(master);
03d5285b
LP		 2696
2697 user_to_new(c, ctrl);
2ccbe779
SN		 2698 return try_or_set_cluster(fh, master, true, ch_flags);
2699}
03d5285b 2700
2ccbe779
SN		 2701/* Helper function for VIDIOC_S_CTRL compatibility */
2702static int set_ctrl_lock(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
2703 struct v4l2_ext_control *c)
2704{
2705 int ret = validate_new(ctrl, c);
2706
2707 if (!ret) {
2708 v4l2_ctrl_lock(ctrl);
2709 ret = set_ctrl(fh, ctrl, c, 0);
2710 if (!ret)
2711 cur_to_user(c, ctrl);
2712 v4l2_ctrl_unlock(ctrl);
2713 }
0996517c
HV		 2714 return ret;
2715}
2716
ab892bac
HV		 2717int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
2718 struct v4l2_control *control)
0996517c
HV		 2719{
2720 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
03d5285b
LP		 2721 struct v4l2_ext_control c;
2722 int ret;
0996517c
HV		 2723
2724 if (ctrl == NULL || !type_is_int(ctrl))
2725 return -EINVAL;
2726
7ebbc39f
HV		 2727 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
2728 return -EACCES;
2729
03d5285b 2730 c.value = control->value;
2ccbe779 2731 ret = set_ctrl_lock(fh, ctrl, &c);
03d5285b
LP		 2732 control->value = c.value;
2733 return ret;
0996517c
HV		 2734}
2735EXPORT_SYMBOL(v4l2_s_ctrl);
2736
2737int v4l2_subdev_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
2738{
ab892bac 2739 return v4l2_s_ctrl(NULL, sd->ctrl_handler, control);
0996517c
HV		 2740}
2741EXPORT_SYMBOL(v4l2_subdev_s_ctrl);
2742
2743int v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
2744{
03d5285b
LP		 2745 struct v4l2_ext_control c;
2746
0996517c
HV		 2747 /* It's a driver bug if this happens. */
2748 WARN_ON(!type_is_int(ctrl));
03d5285b 2749 c.value = val;
2ccbe779 2750 return set_ctrl_lock(NULL, ctrl, &c);
0996517c
HV		 2751}
2752EXPORT_SYMBOL(v4l2_ctrl_s_ctrl);
6e239399 2753
03d5285b
LP		 2754int v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
2755{
2756 struct v4l2_ext_control c;
2757
2758 /* It's a driver bug if this happens. */
2759 WARN_ON(ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
2760 c.value64 = val;
2ccbe779 2761 return set_ctrl_lock(NULL, ctrl, &c);
03d5285b
LP		 2762}
2763EXPORT_SYMBOL(v4l2_ctrl_s_ctrl_int64);
2764
8ac7a949
HV		 2765void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv)
2766{
2767 if (ctrl == NULL)
2768 return;
2769 if (notify == NULL) {
2770 ctrl->call_notify = 0;
2771 return;
2772 }
2773 if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify))
2774 return;
2775 ctrl->handler->notify = notify;
2776 ctrl->handler->notify_priv = priv;
2777 ctrl->call_notify = 1;
2778}
2779EXPORT_SYMBOL(v4l2_ctrl_notify);
2780
2ccbe779
SN		 2781int v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
2782 s32 min, s32 max, u32 step, s32 def)
2783{
2784 int ret = check_range(ctrl->type, min, max, step, def);
2785 struct v4l2_ext_control c;
2786
2787 switch (ctrl->type) {
2788 case V4L2_CTRL_TYPE_INTEGER:
2789 case V4L2_CTRL_TYPE_BOOLEAN:
2790 case V4L2_CTRL_TYPE_MENU:
2791 case V4L2_CTRL_TYPE_INTEGER_MENU:
2792 case V4L2_CTRL_TYPE_BITMASK:
2793 if (ret)
2794 return ret;
2795 break;
2796 default:
2797 return -EINVAL;
2798 }
2799 v4l2_ctrl_lock(ctrl);
2800 ctrl->minimum = min;
2801 ctrl->maximum = max;
2802 ctrl->step = step;
2803 ctrl->default_value = def;
2804 c.value = ctrl->cur.val;
2805 if (validate_new(ctrl, &c))
2806 c.value = def;
2807 if (c.value != ctrl->cur.val)
2808 ret = set_ctrl(NULL, ctrl, &c, V4L2_EVENT_CTRL_CH_RANGE);
2809 else
2810 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
2811 v4l2_ctrl_unlock(ctrl);
2812 return ret;
2813}
2814EXPORT_SYMBOL(v4l2_ctrl_modify_range);
2815
6e6d76cd 2816static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems)
6e239399 2817{
3e366149
HG		 2818 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
2819
2820 if (ctrl == NULL)
2821 return -EINVAL;
2822
6e239399 2823 v4l2_ctrl_lock(ctrl);
77068d36 2824 list_add_tail(&sev->node, &ctrl->ev_subs);
6e239399 2825 if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS &&
77068d36 2826 (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) {
6e239399 2827 struct v4l2_event ev;
c12fcfd6 2828 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
6e239399 2829
c12fcfd6
HV		 2830 if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY))
2831 changes |= V4L2_EVENT_CTRL_CH_VALUE;
2832 fill_event(&ev, ctrl, changes);
6e6d76cd
HV		 2833 /* Mark the queue as active, allowing this initial
2834 event to be accepted. */
2835 sev->elems = elems;
77068d36 2836 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 2837 }
2838 v4l2_ctrl_unlock(ctrl);
3e366149 2839 return 0;
6e239399 2840}
6e239399 2841
3e366149 2842static void v4l2_ctrl_del_event(struct v4l2_subscribed_event *sev)
6e239399 2843{
3e366149
HG		 2844 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
2845
6e239399 2846 v4l2_ctrl_lock(ctrl);
77068d36 2847 list_del(&sev->node);
6e239399
HV		 2848 v4l2_ctrl_unlock(ctrl);
2849}
3e366149
HG		 2850
2851void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new)
2852{
2853 u32 old_changes = old->u.ctrl.changes;
2854
2855 old->u.ctrl = new->u.ctrl;
2856 old->u.ctrl.changes |= old_changes;
2857}
2858EXPORT_SYMBOL(v4l2_ctrl_replace);
2859
2860void v4l2_ctrl_merge(const struct v4l2_event *old, struct v4l2_event *new)
2861{
2862 new->u.ctrl.changes |= old->u.ctrl.changes;
2863}
2864EXPORT_SYMBOL(v4l2_ctrl_merge);
2865
2866const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops = {
2867 .add = v4l2_ctrl_add_event,
2868 .del = v4l2_ctrl_del_event,
2869 .replace = v4l2_ctrl_replace,
2870 .merge = v4l2_ctrl_merge,
2871};
2872EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops);
e2ecb257
HV		 2873
2874int v4l2_ctrl_log_status(struct file *file, void *fh)
2875{
2876 struct video_device *vfd = video_devdata(file);
2877 struct v4l2_fh *vfh = file->private_data;
2878
2879 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) && vfd->v4l2_dev)
2880 v4l2_ctrl_handler_log_status(vfh->ctrl_handler,
2881 vfd->v4l2_dev->name);
2882 return 0;
2883}
2884EXPORT_SYMBOL(v4l2_ctrl_log_status);
a26243b0
HV		 2885
2886int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
85f5fe39 2887 const struct v4l2_event_subscription *sub)
a26243b0
HV		 2888{
2889 if (sub->type == V4L2_EVENT_CTRL)
3e366149 2890 return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops);
a26243b0
HV		 2891 return -EINVAL;
2892}
2893EXPORT_SYMBOL(v4l2_ctrl_subscribe_event);
2894
22fa4279
SN		 2895int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
2896 struct v4l2_event_subscription *sub)
2897{
2898 if (!sd->ctrl_handler)
2899 return -EINVAL;
2900 return v4l2_ctrl_subscribe_event(fh, sub);
2901}
2902EXPORT_SYMBOL(v4l2_ctrl_subdev_subscribe_event);
2903
a26243b0
HV		 2904unsigned int v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait)
2905{
2906 struct v4l2_fh *fh = file->private_data;
2907
2908 if (v4l2_event_pending(fh))
2909 return POLLPRI;
2910 poll_wait(file, &fh->wait, wait);
2911 return 0;
2912}
2913EXPORT_SYMBOL(v4l2_ctrl_poll);
Ubuntu Artful kernel mirror